Despite limitations in these data , our NMA findings are in line with existing evidence on the metabolic effects of fat and support current recommendations to replace high saturated-fat food with unsaturated oils
The aim of this network meta- analysis ( NMA ) is to compare the effects of different oils/solid fats on blood lipids .
Consumption of extra virgin olive oil improves body composition and blood pressure in women with excess body fat: a randomized, double-blinded, placebo-controlled clinical trial
Purpose Despite the fact that extra virgin olive oil ( EVOO ) is widely used in obese individuals to treat cardiovascular diseases , the role of EVOO on weight/fat reduction remains unclear . We investigated the effects of energy-restricted diet containing EVOO on body composition and metabolic disruptions related to obesity . Methods This is a r and omized , double-blinded , placebo-controlled clinical trial in which 41 adult women with excess body fat ( mean ± SD 27.0 ± 0.9 year old , 46.8 ± 0.6 % of total body fat ) received daily high-fat breakfasts containing 25 mL of soybean oil ( control group , n = 20 ) or EVOO ( EVOO group , n = 21 ) during nine consecutive weeks . Breakfasts were part of an energy-restricted normal-fat diets ( −2090 kJ , ~32%E from fat ) . Anthropometric and dual-energy X-ray absorptiometry were assessed , and fasting blood was collected on the first and last day of the experiment . Results Fat loss was ~80 % higher on EVOO compared to the control group ( mean ± SE : −2.4 ± 0.3 kg vs. −1.3 ± 0.4 kg , P = 0.037 ) . EVOO  also reduced diastolic blood pressure when compared to control ( –5.1 ± 1.6 mmHg vs. + 0.3 ± 1.2 mmHg , P = 0.011 ) . Within-group differences ( P < 0.050 ) were observed for HDL-c ( −2.9 ± 1.2 mmol/L ) and IL-10 ( + 0.9 ± 0.1 pg/mL ) in control group , and for serum creatinine ( + 0.04 ± 0.01 µmol/L ) and alkaline phosphatase ( −3.3 ± 1.8 IU/L ) in the EVOO group . There was also a trend for IL-1β  EVOO reduction ( −0.3 ± 0.1 pg/mL , P = 0.060 ) . Conclusion EVOO  consumption reduced body fat and improved blood pressure . Our results indicate that EVOO should be included into energy-restricted programs for obesity treatment
Despite limitations in these data , our NMA findings are in line with existing evidence on the metabolic effects of fat and support current recommendations to replace high saturated-fat food with unsaturated oils
The aim of this network meta- analysis ( NMA ) is to compare the effects of different oils/solid fats on blood lipids .