Effect On Serum Cholesterol Of Dairy Products With Addition Of Esterified Phytosterols

Study Overview
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Brief Summary
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Hypercholesterolemia is an important risk factor for cardiovascular disease, asociated primarily with high plasma levels of LDL lipoprotein, which in turn depend on the endogenous hepatic synthesis of cholesterol and its absorption at intestinal level. It has been demonstrated that there reducing plasma LDL is beneficial, mainly with the use of statins, which are the first treatment option for a moderate hypercholesterolemia. Phytosterols reduce the intestinal absorption of cholesterol by reducing its incorporation into lipid micelles. Consequently, phytosterols have become a relevant alternative treatment against low hypercholesterolemia. The target population are 40 to 65 years old individuals with low hypercholesterolemia.

Detailed Description
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Different protocols have demonstrated that phytosterol intake fluctuates between 1000 to 2000 mg per day decreasing LDL by around 10%, independently of levels of blood triglycerides and HDL (high density lipoproteins) concentrations. In fact, the National Cholesterol Education Program and the American Heart Association recommend the addition of 2 g/day of phytosterols to daily diet of adults. This is also recommended by the FDA (Food and Drug administration). Phytosterols delivery has been proven effective when administrated in lipid matrixes such as margarines and dressings and low-fat such as skimmed milk and yogurt, proving to have an hypolipidemic effect. The investigational products consist of powder milk and a drinking yoghurt with the addition of esterified phytosterols, with a total daily intake of 1.95 g/day (1.17 g/day of free equivalent). Primary objective: To evaluate the impact in Chilean population of phytosterols incorporated into dairy products in reduction of LDL cholesterol. Secondary objectives: To evaluate potential changes in blood cholesterol concentration according to nutritional state and age. To determine the appearance of symptoms and/or effects during the intervention period. The trial has been designed to evaluate the effect of phytosterols incorporated to low fat dairy products in Chile, through the consumption of one glass of milk powder and 90 mL of drinking yoghurt, which results in a daily consumption of 1.95 g/day of esterified phytosterols. This amount falls within demonstrated effective doses reported in literature.

Official Title
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Effect On Serum Cholesterol Of Dairy Products With Addition Of Esterified Phytosterols In Chilean Subjects With Hypercholesterolemia

Conditions
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Dyslipidemias, Hypercholesterolemia

Intervention / Treatment
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* Dietary Supplement: Phytosterol
* Dietary Supplement: Placebo


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Individuals between 40 to 65 y old. Males and females. Body mass index between 20 to 35 kg/m2 Mild hypercholesterolemia (LDL between 130 to 190 mg/dl) without requirement of immediate pharmacological treatment. Without symptoms of atherosclerotic vascular disease. Regular consumption of dairy foods (at least once a day). Sedentary lifestyle defined as less than 20 min, three times per week of moderate to intense physical activity) Exclusion Criteria: Individuals with sitosterolemia. Use of hypolipidemic drugs within the past 6 weeks before initiated the study. Presence of type 1 or 2 diabetes; nephrotic syndrome or chronic kidney disease at stage III (estimated glomerular filtration rate<60 ml/min) or higher; gastrointestinal, liver, hepatobiliary, endocrine diseases or any condition potentially effecting lipid metabolism. History of heart failure, unstable angina, cerebrovascular accident, heart failure, uncontrolled arrhythmias, high blood pressure (systolic>160 mm/Hg or diastolic>100 mm/Hg), cardiac surgery or other vascularization procedure. Blood triglycerides higher than 400 mg/dl. History of cancer disease over the last 5 years. Pregnant and lactating women. Lactose intolerant individuals or presence of related symptoms Individuals with cow´s milk protein allergy. Vegetarians Regular use of drugs for obesity treatment, or affecting lipid metabolism. Regular use of nutritional supplements. Smokers having more than 5 units per day. Individuals drinking more than 3 standard units per day of alcoholic beverages (>3 glasses of wine, 2 beers o 1 strong alcohol).

Ages Eligible for Study
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Minimum Age: 40 Years
Maximum Age: 65 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Triple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Phytosterols<br>Milk powder: subjects will be instructed to consume 22 g/day of the product, with 0.65 g of esterified phytosterols (0.39 g of free equivalent sterols). The product will be reconstituted with 200 ml of water at time of consumption, preferably at breakfast or tea time. The total amount of product will be provided at the beginning of the study (day 1), together with instructions, material for preparation, and storage. Drinking yoghurt: the daily volume consumed will be 90 ml/day with 1.3 grs of esterified phytosterols (0.78 g of free equivalent phytosterols). Subjects will be instructed to consume this beverage with main meal (not later than 15 min after it. The product should be kept refrigerated. Products will be distributed to subjects on a weekly basis. | Dietary Supplement: Phytosterol<br>* Day 1: Anthropometry, laboratory test, dietary intake (24 hour recall and food frequency questionnaire) and presence of symptoms and side effects will be determined, a logbook will be provided to record product consumption, symptoms, medications and side effects. Then will be randomly assigned to one of the groups. Days 7 & 21: 24 hour recall, review of symptoms, side effects and adherence as registered in the logbook. Days 15 & 30: Anthropometry, vital signs, venous blood sample, review of symptoms, side effects and adherence to intervention as registered on logbook, dietary intake (24-hour recall), delivery of monetary compensation proportional to the study days will be given before being discharged.<br>* Other names: ACTICOL;|
| Placebo Comparator: Placebo<br>Milk powder: subjects will be instructed to consume 22 g/day of the product, without phytosterols. The product will be reconstituted with 200 ml of water at time of consumption, preferably at breakfast or tea time. The total amount of product will be provided at the beginning of the study (day 1), together with instructions, material for preparation, and storage. Drinking yoghurt: the daily volume consumed will be 90 ml/day without phytosterols. Subjects will be instructed to consume this beverage with main meal (not later than 15 min after it. The product should be kept refrigerated. Products will be distributed to subjects on a weekly basis. | Dietary Supplement: Placebo<br>* Day 1: Anthropometry, laboratory test, dietary intake (24 hour recall and food frequency questionnaire) and presence of symptoms and side effects will be determined, a logbook will be provided to record product consumption, symptoms, medications and side effects. Then will be randomly assigned to one of the groups. Days 7 & 21: 24 hour recall, review of symptoms, side effects and adherence as registered in the logbook. Days 15 & 30: Anthropometry, vital signs, venous blood sample, review of symptoms, side effects and adherence to intervention as registered on logbook, dietary intake (24-hour recall), delivery of monetary compensation proportional to the study days will be given before being discharged.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Serum LDL Cholesterol |  | 1 month |