Soy, Bone and Health in College Females
This is a 16-week intervention to determine the efficacy of an isoflavone-rich soy based meal supplement to improve bone health and prevent weight and fat gain in 18-19 year old college females. The primary hypothesis is that participants who receive soy will have favorable changes in blood markers of bone and less weight and fat gain. The soy is provided by Physicians Pharmaceuticals, Inc. (Revival® Doctor-formulated soy protein: www.revivalsoy.com/physlabs/).
|Study Design:||Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Primary Purpose: Prevention
|Official Title:||Influence of Soy on Bone Turnover and Body Composition in College Females|
- Bone specific alkaline phosphatase, N-telopeptide, osteocalcin, pyridinoline, deoxypyridinoline, height, weight, waist circumference, fat mass, fat-free soft tissue mass and bone mass will be measured at baseline, 8- and 16-weeks.
- Leptin, adipose tissue vascular endothelial growth factors, angiopoietins, and cytokines will be measured in the serum at baseline, 8- and 16-weeks. The impact of soy on satiety and depression will be measured at baseline, 8- and 16-weeks.
|Study Start Date:||October 2005|
|Estimated Study Completion Date:||March 2006|
The proposed study will be a 16-week randomized, double-blind, placebo-controlled trial designed to test whether a daily isoflavone-rich, soy-based meal replacement Revival® Soy shake promotes favorables changes in bone biomarkers and attenuates weight gain in female college students. First-year college females were selected because of the potential for significant weight gain during their freshman year. The study will have a parallel design with two groups: the soy treatment group (SOY; n = 60) and a casein-based control (CON; n = 60). Exclusion criteria include significant weight loss or gain in the past 3 months, vegetarians and heavy soy food consumers, NCAA Division I athletes, women with eating disorders, present illnesses, chronic disease, and those taking medications or herbal supplements known to affect body weight, body fat or bone. Participants will be stratified based on BMI (18.0-24.9; 25-29.9; ≥30.0) and randomized to either SOY or CON groups.
Female college freshmen enrolled at the University of Georgia will be recruited in the fall of 2005. The soy-based meal replacements will contain 20 g soy protein and 161.2 mg isoflavones, 220-240 kcal, 31-36 g total carbohydrates, 0-2 g dietary fiber, 500 mg calcium, and 2.0-2.5 g total fat per serving. The control shake will have 20 g casein substituted for soy protein, and will be otherwise identical to the soy shakes. The shakes will be available in two flavors: chocolate and vanilla.
|United States, Georgia|
|The University of Georgia|
|Athens, Georgia, United States, 30602|
|Principal Investigator:||Richard D Lewis||The University of Georgia|