Palm oil and cardiovascular disease: a randomized trial of the effects of hybrid palm oil supplementation on human plasma lipid patterns. Effects of palm olein and olive oil on serum lipids in a Chinese population: a randomized, double-blind, cross-over trial. Replacement of dietary fat with palm oil: effect on human serum lipids, lipoproteins and apolipoproteins. The type of oil used for cooking is associated with the risk of nonfatal acute myocardial infarction in costa rica. Diets high in palmitic acid (16:0), lauric and myristic acids (12:0 + 14:0), or oleic acid (18:1) do not alter postprandial or fasting plasma homocysteine and inflammatory markers in healthy Malaysian adults. Palm olein increases plasma cholesterol moderately compared with olive oil in healthy individuals. [Changes in of plasma lipoproteins after the use of palm oil in the diet of a group healthy adults]. Effects of red palm oil on serum lipids and plasma carotenoids level in Chinese male adults. Comparison of the effects of supplemental red palm oil and sunflower oil on maternal vitamin A status. Effects of Partially Hydrogenated, Semi-Saturated, and High Oleate Vegetable Oils on Inflammatory Markers and Lipids Comparison of the effects of medium-chain triacylglycerols, palm oil, and high oleic acid sunflower oil on plasma triacylglycerol fatty acids and lipid and lipoprotein concentrations in humans. Palm Olein and Olive Oil Cause a Higher Increase in Postprandial Lipemia Compared with Lard but Had No Effect on Plasma Glucose, Insulin and Adipocytokines Effect on plasma lipids of interesterifying a mix of edible oils. Short term effects of palm-tocotrienol and palm-carotenes on vascular function and cardiovascular disease risk: A randomised controlled trial. Effects of similar intakes of marine n-3 fatty acids from enriched food products and fish oil on cardiovascular risk markers in healthy human subjects. The effect of red palm olein and refined palm olein on lipids and haemostatic factors in hyperfibrinogenaemic subjects. Small Dense Low-Density Lipoprotein Concentration and Oxidative Susceptibility Changes after Consumption of Soybean Oil, Rice Bran Oil, Palm Oil and Mixed Rice Bran/Palm Oil in Hypercholesterolaemic Women The influence of different combinations of gamma-linolenic, stearidonic and eicosapentaenoic acids on the fatty acid composition of blood lipids and mononuclear cells in human volunteers. Behenic acid is a cholesterol-raising saturated fatty acid in humans. Comparing effects of soybean oil- and palm olein-based mayonnaise consumption on the plasma lipid and lipoprotein profiles in human subjects: a double-blind randomized controlled trial with cross-over design Comparison of effects of lauric acid and palmitic acid on plasma lipids and lipoproteins. Consumption of a functional oil rich in phytosterols and medium-chain triglyceride oil improves plasma lipid profiles in men. Consumption of an oil composed of medium chain triacyglycerols, phytosterols, and N-3 fatty acids improves cardiovascular risk profile in overweight women.
This study examines , for the first time , the effect of  hybrid Elaeis oleifera × E. guineensis palm oil supplementation on human plasma lipids related to CVD risk factors . One hundred sixty eligible participants were r and omized and assigned to one of the two treatments : 25 mL hybrid palm oil ( HPO group ) or 25 mL extra virgin olive oil ( EVOO group ) daily for 3 months . Fasting venous sample s were obtained at baseline and after 1 , 2 and 3 months for measurement of plasma lipids ( TC , LDL-C , HDL-C and TAGs ) . Changes in body mass index and waist circumference were also assessed . Although there was an overall reduction in TC ( 7.4 % , p < 0.001 ) and in LDL-C ( 15.6 % , p < 0.001 ) , no significant differences were found between the treatment groups in a repeated measures analysis of variance for TC ( p = 0.0525 ) , LDL-C ( p = 0.2356 ) , HDL-C ( p = 0.8293 ) or TAGs ( p = 0.3749 ) . Furthermore , HPO consumption had similar effects on plasma lipids to EVOO , thus providing additional support for the concept that hybrid Elaeis oleifera × E. guineensis palm oil can be seen as a " tropical equivalent of olive oil " BACKGROUND AND OBJECTIVES As the most widely produced edible vegetable oil , palm oil is known as to contain a high level of saturated fatty acid , which was thought to adversely affect serum lipid profiles . However , recent studies have shown no influence or benefits of palm oil on serum lipids . The potential nutritional value of palm oil is attributed to the high mono-unsaturation at the crucial sn2-position of the oil 's triacylglycerols , as with the so-called ' healthy ' olive oil ( OO ) . The aim of this study was to further test this hypothesis and evaluate the effects of consuming palm olein versus olive oil on serum lipid profiles in a Chinese population . METHODS AND STUDY DESIGN In total , 120 participants were recruited from a spinnery in Yixing city and r and omly divided into two groups ( palm olein or olive oil ) to conduct a 2 × 2 crossover trial for 2 months ' intervention with 2-week washout periods . Each participant was provided 48 g of test oil per day . At the end of each period , anthropometry , and blood lipid indices were measured to determine the effects of palm olein and olive oil . RESULTS Palm olein and olive oil consumption had no significantly different effect on BMI , on serum total cholesterol , low-density lipoprotein cholesterol , high-density lipoprotein cholesterol , triacylglycerol ( TG ) , Apo B , fasting glucose , or insulin concentrations ( all p>0.05 ) . CONCLUSIONS In a dietary crossover trial , palm olein and olive oil had no recognisably different effects on body fatness or blood lipids in a healthy Chinese population Thirty-eight male volunteers participated in a double-blind cross-over trial evaluating the effect of replacing the usual sources of saturated fat in the Dutch diet ( animal fats and hydrogenated oils ) by palm oil , which is virtually free of cholesterol and trans-fatty acids , on serum lipids , lipoproteins and apolipoproteins . Maximum ( about 70 % ) replacement had no significant effect on serum total cholesterol or most lipoprotein fractions , but result ed in an 11 % increase in serum high-density-lipoprotein (HDL)2-cholesterol relative to the control ( P2 = 0.01 ) . The palm-oil diet also caused an 8 % decrease in low-density-lipoprotein (LDL):HDL2 + HDL3-cholesterol ratio ( P2 = 0.02 ) as well as a 9 % decrease in triacylglycerols in the low-density-lipoprotein fractions ( P2 = 0.01 ) . Palm oil consumption result ed in a 4 % increase in serum apolipoprotein AI ( P2 = 0.008 ) and a 4 % decrease in apolipoprotein B ( P2 = 0.01 ) relative to the control diet ; the B : AI apolipoprotein ratio was decreased by 8 % ( P2 < 0.0001 ) . These results were not significantly affected by the different lipoprotein E phenotypes of the volunteers . Although the observed differences were relatively modest , the present study , nonetheless , indicates that dietary palm oil , when replacing a major part of the normal fat content in a Dutch diet , may slightly reduce the lipoprotein- and apolipoprotein-associated cardiovascular risk profiles Palm oil and soybean oil are the 2 most widely used cooking oils in the world . Palm oil is consumed mainly in developing countries , where morbidity and mortality due to cardiovascular disease ( CVD ) are on the rise . Although cl aims about adverse or protective effects of these oils are commonly made , there are no epidemiologic studies assessing the association between these oils and cardiovascular disease endpoints . We examined whether consumption of palm oil relative to soybean oil and other unsaturated oils ( predominantly sunflower ) is associated with  myocardial infa rct ion ( MI ) in Costa Rica . The cases ( n = 2111 ) were survivors of a first acute MI and were matched to r and omly selected population controls ( n = 2111 ) .  Dietary intake was assessed with a vali date d semiquantitative FFQ . Adipose tissue profiles of essential fatty acids were assessed to vali date cooking oil intake and found to be consistent with self-reported major oils used for cooking . The data were analyzed using conditional logistic regression . Palm oil users were more likely to have an MI than users of soybean oil [ odds ratio ( OR ) = 1.33 ; 95 % CI : 1.08 - 1.63 ] or other cooking oils ( OR = 1.23 ; CI : 0.99 - 1.52 ) , but they did not differ from users of soybean oil with a high trans-fatty acid content ( OR = 1.14 ; CI : 0.84 - 1.56 ) . These data suggest that as currently used in Costa Rica , and most likely in many other developing countries , the replacement of palm oil with a polyunsaturated nonhydrogenated vegetable oil would reduce the risk of MI BACKGROUND Dietary fat type is known to modulate the plasma lipid profile , but its effects on plasma homocysteine and inflammatory markers are unclear . OBJECTIVE We investigated the effects of high-protein Malaysian diets prepared with palm olein , coconut oil ( CO ) , or virgin olive oil on plasma homocysteine and selected markers of inflammation and cardiovascular disease ( CVD ) in healthy adults . DESIGN A r and omized-crossover intervention with 3 dietary sequences of 5 wk each was conducted in 45 healthy subjects . The 3 test fats , namely palmitic acid (16:0)-rich palm olein ( PO ) , lauric and myristic acid ( 12:0 + 14:0)-rich CO , and oleic acid (18:1)-rich virgin olive oil ( OO ) , were incorporated at two-thirds of 30 % fat calories into high-protein Malaysian diets . RESULTS No significant differences were observed in the effects of the 3 diets on plasma total homocysteine ( tHcy ) and the inflammatory markers TNF-α , IL-1β , IL-6 , and IL-8 , high-sensitivity C-reactive protein , and interferon-γ . Diets prepared with PO and OO had comparable nonhypercholesterolemic effects ; the postpr and ial total cholesterol for both diets and all fasting lipid indexes for the OO diet were significantly lower ( P < 0.05 ) than for the CO diet . Unlike the PO and OO diets , the CO diet was shown to decrease postpr and ial lipoprotein(a ) . CONCLUSION Diets that were rich in saturated fatty acids prepared with either PO or CO , and an OO diet that was high in oleic acid , did not alter postpr and ial or fasting plasma concentrations of tHcy and selected inflammatory markers . This trial was registered at clinical trials.gov as NCT00941837 BACKGROUND Despite the high content of palmitic acid , palm olein has been shown to have a neutral effect on plasma cholesterol concentrations when compared with olive oil , which is suggested to be attributable to palmitic acid in the sn-1 and sn-3 position . In contrast , palmitic acid is in the sn-2 position in lard . OBJECTIVE The objective was to investigate the effects of a diet rich in palm olein , fractionated palm oil , olive oil , and lard on plasma blood lipids , inflammatory markers , glucose , and insulin . DESIGN A controlled double-blinded , r and omized 3 × 3 wk crossover dietary intervention study included 32 healthy men who daily replaced part of their habitual dietary fat intake with ~ 17 % of energy from palm olein , olive oil , or lard , respectively . RESULTS Compared with intake of olive oil , palm olein and lard  increased total cholesterol and LDL cholesterol ( P < 0.0001 ) . Palm olein result ed in a lower plasma triacylglycerol concentration than did olive oil ( P < 0.01 ) . No difference in effects was observed in plasma HDL-cholesterol , high-sensitivity C-reactive protein , plasminogen activator-1 , insulin , and glucose concentrations . CONCLUSIONS The current study did not support the previous finding that the effect of palm olein on total plasma cholesterol and LDL cholesterol in healthy individuals with normal plasma cholesterol concentrations is neutral compared with that of olive oil . Thus , sn-positioning was not confirmed to be important with regard to the effect on plasma cholesterol . The relatively lower plasma triacylglycerol concentration  after the palm olein diet than after the olive oil diet was unexpected . This trial is registered at clinical trials.gov as NCT00743301 UNLABELLED Although saturated fat acids have long known to have harmful effects on cholesterol and triacylglycerides levels in blood , new concepts have emerged form recent research on this matter . The purpose of this study was to know the effect of the consumption of palm olein on triacylglycerides and cholesterol levels as well as lipoprotein fractions in the blood plasma of healthy individuals from both sexes . MATERIAL S AND METHODS Different types of fats were administered for 12 weeks to 60 subjects , 45 male , 15 female , between 19 and 45 years of age , who were divided into three groups : the mix group ( MG ) was administered oil , margarine , and mayonnaise prepared with 50 % olein ; the olein group ( OG ) consumed fats prepared with 100 % olein ; and the control group ( CG ) consumed regular fats of customary use by the population . The diets provided 25 to 30 % of calories . Blood sample s were obtained for lipid analysis at the beginning and the end of the study . Plasma triacylglycerides and cholesterol concentrations were determined by means of enzyme and lipoprotein methods ( VLDL , LDL ; and HDL ) by ultracentrifugation . RESULTS AND DISCUSSION By comparing the groups ' means no significant differences were found ( p > 0.05 ) in blood lipids . Individual differences show a slight increase in VLDL-C in OG compared to MG and CG . No differences were found in LDL concentration . CONCLUSIONS These results contribute evidence to differentiate between the effects of saturated vegetables oils , such as coconut oil , and of palm olein . The authors recommend not extrapolate the effects of type of oil to another in connection with TC increase in blood OBJECTIVE Effects of red palm oil on major plasma carotenoids , tocopherol , retinol and serum lipids were evaluated when used in Chinese diet . METHODS Red palm oil group ( RPO ) composed of 20 male subjects(aged 18 - 32 ) and soybean oil group ( SBO ) composed of 22 male subjects ( aged 18 - 32 ) . Dietary fat provided about 28 % of total calories , and the test oil accounted for about 60 % of total dietary fat . In the 3 weeks of pretest period , diets were prepared with soybean oil , and then in the next 6 weeks subjects in each group consumed the diet prepared by test oil . RESULTS Plasma alpha-carotene , beta-carotene and lycopene concentration of RPO group significantly increased at the time of interim ( 21 days ) and of the end ( 42 days ) ( P < 0.05 ) , and alpha-tocopherol concentration significantly increased at the time of the end ( 42 days ) in this study . Though Chinese plasma retinol level was relatively low when compared with that of Westerners , red palm oil diet showed no significant effect on adult Chinese plasma retinol level . Serum concentration of total cholesterol , triglyceride , high density lipoprotein cholesterol , apolipoprotein AI and apolipoprotein B of all subjects showed no significant changes in RPO group during the study . CONCLUSIONS The data in our study suggest that red palm oil is a good source of carotenoids and vitamin E when used in Chinese diet preparation , and it can significantly increase plasma concentration of alpha-carotene , beta-carotene , lycopene and alpha-tocopherol BACKGROUND Conflicting results have been reported on the ability of dietary carotenoids to improve vitamin A status in lactating women .  Red palm oil is one of the richest dietary sources of beta-carotene . OBJECTIVE We aim ed to determine the efficacy of red palm oil in increasing retinol and provitamin A status in pregnant and lactating women . DESIGN Ninety rural , pregnant Tanzanian women from 3 r and omly selected villages were recruited during their third trimester to participate in 3 dietary intervention groups : a control group , who were encouraged to maintain the traditional practice of eating staples with dark-green leafy vegetables , and 2 study groups , who were given either sunflower or red palm oil for use in household food preparations . The intervention lasted 6 mo . Plasma sample s were collected at the third trimester and 1 and 3 mo postpartum , and breast-milk sample s were collected 1 and 3 mo postpartum . RESULTS Supplementation with red palm oil , which is rich in provitamin A , increased alpha- and beta-carotene concentrations significantly ( P < 0.001 ) in both plasma and breast milk . Plasma retinol concentrations were similar in all dietary groups . Breast-milk retinol concentrations tended to decrease from 1 to 3 mo postpartum in the control group , but were maintained in both oil groups . The difference in change in breast-milk retinol concentration between the red palm oil group and the control group was significant ( P = 0.041 ) . CONCLUSIONS Consumption of red palm oil increases concentrations of alpha- and beta-carotene in both breast milk and serum and maintains breast-milk retinol concentrations . Sunflower oil consumption seems to conserve breast-milk retinol similarly to consumption of red palm oil . Breast-milk retinol might be maintained through increased dietary intake of these vegetable oils and use of mild cooking preparation methods ( such as the addition of oil at the end of cooking and avoidance of frying ) Knowledge about the effects of dietary fats on sub clinical inflammation and cardiovascular disease risk are mainly derived from studies conducted in Western population s. Little information is available on South East Asian countries . This current study investigated the chronic effects on serum inflammatory markers , lipids , and lipoproteins of three vegetable oils . Healthy , normolipidemic subjects ( n = 41 ; 33 females , 8 males ) completed a r and omized , single-blind , crossover study . The subjects consumed high oleic palm olein ( HOPO diet : 15 % of energy 18:1n-9 , 9 % of energy 16:0 ) , partially hydrogenated soybean oil ( PHSO diet : 7 % of energy 18:1n-9 , 10 % of energy 18:1 trans ) and an unhydrogenated palm stearin ( PST diet : 11 % of energy 18:1n-9 , 14 % of energy 16:0 ) . Each dietary period lasted 5 weeks with a 7 days washout period . The PHSO diet significantly increased serum concentrations of high sensitivity C-reactive protein compared to HOPO and PST diets ( by 26 , 23 % , respectively ; P < 0.05 for both ) and significantly decreased interleukin-8 ( IL-8 ) compared to PST diet ( by 12 % ; P < 0.05 ) . In particular PHSO diet , and also PST diet , significantly increased total : HDL cholesterol ratio compared to HOPO diet ( by 23 , 13 % , respectively ; P < 0.05 ) , with the PST diet having a lesser effect than the PHSO diet ( by 8 % ; P < 0.05 ) . The use of vegetable oils in their natural state might be preferred over one that undergoes the process of hydrogenation in modulating blood lipids and inflammation Although medium-chain triacylglycerols ( MCTs , composed of medium-chain fatty acids 8:0 and 10:0 ) have long been described as having neutral effects on serum cholesterol concentrations , experimental evidence supporting this cl aim is limited . In a r and omized , crossover , metabolic-ward study , we compared the lipid effects of a natural food diet supplemented with either MCTs , palm oil , or high oleic acid sunflower oil in nine middle-aged men with mild hypercholesterolemia . Rather than having a neutral effect , MCT oil produced total cholesterol concentrations that were not significantly different from those produced by palm oil ( MCT oil : 5.87 + /- 0.75 mmol/L ; palm oil : 5.79 + /- 0.72 mmol/L ) but significantly higher than that produced by high oleic acid sunflower oil ( 5.22 + /- 0.52 mmol/L ) . Low-density-lipoprotein (LDL)-cholesterol concentrations paralleled those of total cholesterol .  MCT oil tended to result in higher triacylglycerol concentrations than either palm oil or high oleic acid sunflower oil , but this difference was not significant . There were no differences in high-density-lipoprotein cholesterol concentrations . The palmitic acid and total saturated fatty acid content of plasma triacylglycerols in the MCT-oil diet was not significantly different from that in the palm oil diet . On the basis of percentage of energy , this study suggests that medium-chain fatty acids have one-half the potency that palmitic acid has at raising total and LDL-cholesterol concentrations Postpr and ial lipemia impairs insulin sensitivity and triggers the pro-inflammatory state which may lead to the progression of cardiovascular diseases . A r and omized , crossover single-blind study ( n = 10 healthy men ) was design ed to compare the effects of a high-fat load ( 50 g fat ) , rich in palmitic acid from both plant ( palm olein ) or animal source ( lard ) versus an oleic acid-rich fat ( virgin olive oil ) on lipemia , plasma glucose , insulin and adipocytokines . Serum triacylglycerol ( TAG ) concentrations were significantly lower after the lard meal than after the olive oil and palm olein meals ( meal effect P = 0.003 ; time effect P < 0.001 ) . The greater reduction in the plasma non-esterified free fatty acids levels in the lard group compared to the olive oil meal was mirrored by the changes observed for serum TAG levels ( P < 0.05 ) . The magnitude of response for plasma glucose , insulin and adipocytokines [ interleukin-6 ( IL-6 ) , tumor necrosis factor-α ( TNF-α ) , interleukin-1β ( IL-1β ) and leptin ] were not altered by the type of dietary fats . A significant difference in plasma IL-1β was found over time following the three high fat loads ( time effect P = 0.036 ) . The physical characteristics and changes in TAG structure of lard may contribute to the smaller increase in postpr and ial lipemia compared with palm olein . A high fat load but not the type of fats influences concentrations of plasma IL-1β over time but had no effect on other pro-inflammatory markers tested in the postpr and ial state The aim was to establish whether interesterification of oils , an alternative to the use of trans fatty acids in margarine manufacture , adversely affects plasma lipids .  Twenty-seven hypercholesterolemic men participated in a double-blind , crossover trial of three margarines : 1 ) high-linoleic acid , moderate trans fatty acids ; 2 ) high-palm oil blend ( predominantly lauric , myristic , palmitic , oleic , and linoleic acids ) ; and 3 ) an interesterified form of the high-palm oil margarine . Both high-palm oil margarines led to similar low-density-lipoprotein ( LDL ) cholesterol concentrations ( 4.43 + /- 0.94 and 4.54 + /- 0.88 mmol/L , respectively ) , which were significantly higher than the LDL concentrations after the high-linoleic acid margarine ( 4.02 + /- 0.85 mmol/L , P < 0.001 ) . Interesterification transferred substantial proportions of palmitic acid into the sn-2 position of glycerides and unsaturated fatty acids into the sn-1,3 positions , and this was reflected in plasma chylomicrons . This study shows that interesterification of oils used to harden margarines does not raise plasma cholesterol more than does the margarine 's constituent fatty acids BACKGROUND AND AIMS In vitro , ex vivo and animal studies suggest palm-based tocotrienols and carotenes enhance vascular function , but limited data in humans exists . The aim was to examine the effects of palm-tocotrienols ( TRF- 80 ) and palm-carotene ( CC-60 ) supplementation on vascular function and cardiovascular disease ( CVD ) risk factors in adults at increased risk of impaired vascular function . METHODS Ninety men and women ( 18 - 70 yr , 20 - 45 kg/m2 ) with type 2 diabetes , impaired fasting glucose and /or elevated waist circumference were r and omised to consume either TRF-80 ( 420 mg/day tocotrienol + 132 mg/day tocopherol ) , CC-60 ( 21 mg/day carotenes ) or placebo ( palm olein ) supplements for 8 weeks . Brachial artery flow-mediated dilation ( FMD ) , other physiological and circulatory markers of vascular function , lipid profiles , glucose , insulin and inflammatory markers were assessed pre- and post-supplementation . Pairwise comparisons were performed using mixed effects longitudinal models ( n = 87 , n = 3 withdrew before study commencement ) . RESULTS Plasma α- and β-carotene and α- , δ- and γ-tocotrienol concentrations increased in CC-60 and TRF-80 groups , respectively , compared to placebo ( mean ± SE difference in total plasma carotene change between CC-60 and placebo : 1.5 ± 0.13 μg/ml , p < 0.0001 ; total plasma tocotrienol change between TRF-80 and placebo : 0.36 ± 0.05 μg/ml , p < 0.0001 ) . Neither FMD ( treatment x time effect for CC-60 vs. placebo , p = 0.71 ; TRF-80 vs. placebo , p = 0.80 ) nor any other vascular function and CVD outcomes were affected by treatments . CONCLUSIONS CC-60 and TRF-80 supplementation increased bioavailability of palm-based carotenes and tocotrienols but had no effects , superior or detrimental , on vascular function or CVD risk factors There is convincing evidence that consumption of fish and fish oil rich in long-chain ( LC ) n-3 PUFA ( n-3 LCPUFA ) , EPA ( 20 : 5n-3 ) and DHA ( 22 : 6n-3 ) reduce the risk of CHD . The aim of the present study was to investigate whether n-3 LCPUFA-enriched food products provide similar beneficial effects as fish oil with regard to incorporation into plasma lipids and effects on cardiovascular risk markers . A parallel 7-week intervention trial was performed where 159 healthy men and women were r and omised to consume either 34 g fish pâté ( n 44 ) , 500 ml fruit juice ( n 38 ) or three capsules of concentrated fish oil ( n 40 ) , all contributing to a daily intake of approximately 1 g EPA and DHA . A fourth group did not receive any supplementation or food product and served as controls ( n 37 ) . Plasma fatty acid composition , serum lipids , and markers of inflammation and oxidative stress were measured . Compared with the control group , plasma n-3 LCPUFA and EPA : arachidonic acid ratio increased equally in all intervention groups . However , no significant changes in blood lipids and markers of inflammation and oxidative stress were observed . In conclusion , enriched fish pâté and fruit juice represent suitable delivery systems for n-3 LCPUFA . However , although the dose given is known to reduce the risk of CVD , no significant changes were observed on cardiovascular risk markers in this healthy population Little is known about the physiological effects of red palm olein ( RPO ) . The effects of red palm olein and palm olein ( POL ) compared to sunflower oil ( SFO ) , on lipids , haemostatic factors and fibrin network characteristics in hyperfibrinogenaemic volunteers were investigated . Fifty-nine free-living , hyperfibrinogenaemic volunteers participated in this r and omized , controlled , single blind parallel study . After a 4-week run-in , during which subjects received sunflower oil products , they were paired and r and omly assigned to one of three intervention groups receiving products containing 25 g/day ( approximately 12 % of total energy intake ) of either red palm olein , palm olein or sunflower oil for another 4 weeks . Anthropometric measurements , blood sample s and dietary intakes were measured before run-in , and before and after intervention . The differences in changes in total serum cholesterol response between palm olein and red palm olein ( + 0.59 vs. + 0.18 mmol/l ; p=0.053 ) , and between palm olein and sunflower oil ( + 0.59 vs. -0.003 mmol/l ; p < or = 0.01 ) were significant . The low-density lipoprotein cholesterol ( LDLC ) response in the palm olein- and sunflower oil-groups also differed significantly ( + 0.42 vs. -0.11 mmol/l ; p < or = 0.01 ) . Tissue plasminogen activator antigen ( tPA(ag ) ) decreased significantly in the red palm olein group compared to the palm olein- and sunflower oil-groups . No effects were found in other haemostatic variables .  Palm olein and red palm olein had no independent effect on fibrin network characteristics . In conclusion , compared to palm olein , red palm olein had less detrimental effects on the lipid profile and decreased tissue plasminogen activator antigen . Studies in larger groups are advised for confirmation of results , elucidation of mechanisms and effects of nonglyceride constituents of red palm oil ( PO ) The effects of a diet containing soybean oil ( SBO ) , rice bran oil ( RBO ) , palm oil ( PO ) or a RBO/PO ( 3:1 ) mixture on the composition and oxidation of small dense low-density lipoproteins ( sdLDL ) in 16 hypercholesterolaemic women were investigated . During the 8-week control period , participants consumed a free-choice weight-maintaining diet comprising carbohydrate ( 55 % energy ) , protein ( 15 % energy ) and fat ( 30 % energy ) with < 300 mg/day of cholesterol . During each 10-week study period , participants consumed this same diet but with the addition of one of the three test oils or the RBO/PO mixture .  Total cholesterol and low-density lipoprotein (LDL)-cholesterol levels were significantly reduced during SBO , RBO and RBO/PO consumption , while high-density lipoprotein cholesterol was significantly decreased by SBO consumption . There was a significant reduction in sdLDL-cholesterol levels only after using SBO and it tended to be reduced during RBO/PO consumption , whereas it was significantly increased following PO consumption . The sdLDL oxidation lag time was significantly increased during PO , RBO/PO and RBO consumption , but significantly reduced following SBO . The results for the RBO/PO mixture suggest that this oil mixture might further reduce the risk of atherosclerosis This study set out to identify whether stearidonic acid ( 18:4n-3 ; STA ) can be used to increase the eicosapentaenoic acid ( 20:5n-3 ; EPA ) content of plasma lipids and cells in humans and to underst and more about the effects of increased consumption of gamma-linolenic acid ( 18:3n-3 ; GLA ) , STA and EPA in humans . Healthy young males were r and omised to consume one of seven oil blends for a period of 12 weeks ( 9 g oil/day ) ( n = 8 - 12 subjects/group ) . Palm oil , sunflower oil , an EPA-rich oil , borage oil ( rich in GLA ) , and Echium oil ( rich in STA ) were blended in various combinations to generate a placebo oil and oils providing approximately 2 g GLA + STA + EPA per day , but in different combinations . Blood was collected at 0 , 4 , 8 and 12 weeks and the fatty acid compositions of plasma triacylglycerols , cholesteryl esters and phospholipids and of peripheral blood mononuclear cells ( P BMC s ) determined . Significant effects were observed with each lipid fraction . Neither STA nor its derivative 20:4n-3 appeared in any of the lipid fractions studied when STA ( up to 1g/day ) was consumed . However , STA ( 1g/day ) , in combination with GLA ( 0.9 g/day ) , increased the proportion of EPA in some lipid fractions , suggesting that STA-rich plant oils may offer a novel means of increasing EPA status . Furthermore , this combination tended to increase the dihomo-gamma-linolenic acid ( 20:3n-6 ; DGLA ) content of P BMC s , without an increase in arachidonic acid ( AA ) ( 20:4n-6 ) content . EPA consumption increased the EPA content of all lipid fractions studied . Consumption of GLA ( 2g/day ) , in the absence of STA or EPA , increased DGLA content with a tendency to increase AA content in some fractions . This effect was prevented by inclusion of EPA in combination with GLA . Thus , this study indicates that STA may be used as a precursor to increase the EPA content of human lipids and that combinations of GLA , STA and EPA can be used to manipulate the fatty acid compositions of lipid pools in subtle ways . Such effects may offer new strategies for manipulation of cell composition in order to influence cellular responses and functions in desirable ways BACKGROUND Dietary behenic acid ( 22:0 ) is poorly absorbed . Because of its low bioavailability compared with other fatty acids and because of its very long chain length , the effect of dietary behenic acid ( behenate ) on serum lipid concentrations in humans is assumed to be neutral . OBJECTIVE The objective was to establish the cholesterol-raising potential of behenic acid by comparing the effects on lipid and lipoprotein concentrations of a specially formulated fat enriched with behenic acid with those of palm oil ( rich in palmitic acid ; 16:0 ) and high-oleic acid sunflower oil ( rich in cis oleic acid ; 18:1 ) . DESIGN In a r and omized , crossover , metabolic-ward study , 7 mildly hypercholesterolemic men were fed 3 natural-food diets supplemented with behenate oil , palm oil , or high-oleic acid sunflower oil .  Mean serum lipid and lipoprotein concentrations and plasma triacylglycerol fatty acid composition were determined from fasting blood drawn during the final 4 d of each 3-wk diet period . RESULTS Behenate oil produced mean concentrations of total cholesterol ( 5.87+/-0.8 mmol/L ) and LDL cholesterol ( 4.40+/-0.8 mmol/L ) not significantly different from those produced by palm oil ( 5.84+/-0.7 and 4.42+/-0.7 mmol/L , respectively ) but significantly higher than those produced by high-oleic acid sunflower oil ( 5.12+/-0.5 and 3.70+/-0.6 mmol/L , respectively ) . There were no significant differences in triacylglycerol or HDL-cholesterol concentrations . CONCLUSIONS Despite its low bioavailability compared with oleic acid , behenic acid is a cholesterol-raising fatty acid in humans and is therefore not a suitable substitute for palmitic acid in manufactured triacylglycerols Background Mayonnaise is used widely in contemporary human diet with widespread use as a salad dressing or spread on breads . Vegetable oils used in its formulation may be a rich source of ω-6 PUFAs and the higher-PUFA content of mayonnaise may be beneficial in mediating a hypocholesterolemic effect . This study , therefore , evaluated the functionality of mayonnaise on cardiometabolic risk within a regular human consumption scenario . Methods Subjects underwent a r and omized double-blind crossover trial , consuming diets supplemented with 20 g/day of either soybean oil-based mayonnaise ( SB-mayo ) or palm olein-based mayonnaise ( PO-mayo ) for 4 weeks each with a 2-week wash-out period . The magnitude of changes for metabolic outcomes between dietary treatments was compared with PO-mayo serving as the control . The data was analyzed by ANCOVA using the GLM model . Analysis was adjusted for weight changes . Results Treatments result ed in significant reductions in TC ( diff = −0.25 mmol/L ; P = 0.001 ) , LDL-C ( diff = −0.17 mmol/L ; P = 0.016 ) and HDL-C ( diff = −0.12 mmol/L ; P < 0.001 ) in SB-mayo compared to PO-mayo without affecting LDL-C : HDL-C ratio ( P > 0.05 ) . Lipoprotein particle change was significant with large LDL particles increasing after PO-mayo ( diff = + 63.2 nmol/L ; P = 0.007 ) compared to SB-mayo but small LDL particles remained unaffected . Plasma glucose , apolipoproteins and oxidative stress markers remained unchanged . Conclusions Daily use with 20 g of linoleic acid-rich SB-mayo elicited reductions in TC and LDL-C concentrations without significantly changing LDL-C : HDL-C ratio or small LDL particle distributions compared to the PO-mayo diet . Trial registration This clinical trial was retrospectively registered with the National Medical Research Register , National Institute of Health , Ministry of Health Malaysia , ( NMRR-15 - 40 - 24035 ; registered on 29/01/2015 ; https://www.nmrr.gov.my/fwbPage.jsp?fwbPageId= Research ISRForm&fwbAction = Up date & fwbStep=10&pk . research ID=24035&fwbVMenu=3&fwb Research Action = Up date ) . Ethical approval was obtained from the National University of Malaysia ’s Medical Ethics Committee ( UKM 1.5.3.5/244/SPP/NN-054-2011 , approved on 25/05/2011 ) The effects of lauric acid ( C12:0 ) on plasma lipids and lipoproteins were compared with the effects of palmitic acid ( C16:0 ) and oleic acid ( C18:1 ) in a metabolic-diet study of 14 men by using liquid-formula diets fed for 3 wk each in r and om order . Lauric acid was supplied in a synthetic high-lauric oil , palmitic acid was provided by palm oil and oleic acid in oleic-rich sunflower seed oil . The high-lauric oil result ed in higher concentrations of plasma total cholesterol ( 4.94 + /- 0.75 mmol/L [ mean + /- SE ] ) and LDL cholesterol ( 3.70 + /- 0.57 mmol/L ) when compared with high-oleic sunflower oil ( 4.44 + /- 0.54 and 3.31 + /- 0.44 mmol/L , respectively ) , but did not raise total and LDL cholesterol concentrations as much as did palm oil ( 5.17 + /- 0.65 and 3.93 + /- 0.51 mmol/L , respectively ) . No differences were noted in plasma triglycerides or HDL cholesterol .  Lauric acid raises total and LDL cholesterol concentrations compared with oleic acid , but is not as potent for increasing cholesterol concentrations as is palmitic acid Medium-chain triglycerides ( MCT ) have been proposed as weight-lowering agents , although there is some concern regarding their hyperlipidemic effect . This study evaluates the effects of a combination of MCT oil , phytosterols and flaxseed oil [ functional oil ( FctO ) ] on plasma lipid concentrations and LDL particle size .  Twenty-four healthy overweight men ( body mass index 28.2 + /- 0.4 kg/m(2 ) ) consumed controlled diets design ed to maintain weight for two periods of 29 d each . Diets contained 40 % of energy as fat , 75 % of which was added fat , either FctO or olive oil ( OL ) .  Body composition and blood sample s were analyzed at the baseline and the endpoint of each period . Total cholesterol concentration decreased 12.5 % ( -0.68 mmol/L ; P < 0.05 ) when subjects consumed FctO and 4.7 % when they consumed OL . Similarly , FctO consumption lowered LDL cholesterol concentrations by 13.9 % , whereas OL consumption did not . There was no difference in absolute change in LDL-cholesterol between FctO and OL consumption . Peak LDL particle size was greater in those who consumed FctO than in those who consumed OL ( P < 0.05 ) , with no effect of diet on proportion of large , medium or small particles . We conclude that those who consume a diet containing FctO have a better lipid profile than those who consume a diet rich in OL , which also leads to a larger lipoprotein particle size .  Functional oil consumption can therefore help reduce the risk of cardiovascular disease Medium chain triacylglycerols ( MCT ) have been suggested as efficacious in weight management because they possess greater thermogenic qualities relative to long chain triacylglycerols ; however , MCT may also increase circulating lipid concentrations , possibly increasing risk of cardiovascular disease ( CVD ) . The present objective was to examine the effect of a diet supplemented with a functional oil ( FctO ) composed of energy expenditure-enhancing MCT ( 50 % of fat ) , cholesterol-lowering phytosterols ( 22 mg/kg body weight ) , and triacylglycerol-suppressing n-3 fatty acids ( 5 % of fat ) , versus a beef tallow-based diet ( BT ) , on plasma lipid and aminothiol concentrations . In a r and omized , single-blind , crossover design , partially-inpatient trial , 17 overweight women consumed each oil as part of a controlled , supervised , targeted energy balance diet for 27 days , with 4 or 8 weeks of washout between phases . Mean plasma total cholesterol concentration was lower ( P < .0001 ) , by 9.1 % , on FctO ( 4.37 + /- 0.20 mmol/L ) versus BT ( 4.80 + /- 0.20 mmol/L ) . Mean plasma low-density lipoprotein ( LDL ) cholesterol was also lower ( P < .0001 ) following FctO ( 2.39 + /- 0.15 mmol/L ) versus BT ( 2.86 + /- 0.16 mmol/L ) , representing a 16.0 % difference between diets . High-density lipoprotein ( HDL ) cholesterol and circulating triacylglycerol concentrations remained unaffected by treatment . Ratios of HDL : LDL and HDL : total cholesterol were higher ( P < .01 ) by 22.0 % and 11.0 % , respectively , on FctO versus BT . Plasma total homocysteine remained unchanged with FctO , but decreased ( P < .05 ) with control , hence higher ( P < .05 ) end points were observed with FctO ( 6.95 + /- 0.33 micromol/L ) versus BT ( 6.27 + /- 0.28 micromol/L ) . Plasma glutathione increased ( P < .05 ) by 0.44 micromol/L with FctO supplementation . In conclusion , despite equivocal effects on homocysteine levels , consumption of a functional oil composed of MCT , phytosterols , and n-3 fatty acids for 27 days improves the overall cardiovascular risk profile of overweight women
Subgroup analyses revealed that palm oil has a beneficial effect on High-density lipoprotein cholesterol levels when more than 30 % of total dietary energy was constituted by fat .
This review revealed that palm oil does not induce increases in cardiovascular disease risk risk-related biomarkers relative to unsaturated fatty acids .
BACKGROUND AND OBJECTIVES The precise association between palm oil consumption and  lipid-related cardiovascular disease risk remains unclear .
A systematic review was thus performed to assess whether palm oil consumption has a negative effect on plasma lipid-related cardiovascular disease marker levels .