Macro partitioning
Incorporating soy protein into a high-protein, energy-restricted diet produces weight loss and body composition changes equivalent to non-soy protein sources, making it a viable alternative for vegetarians and omnivores.
If you are trying to lose weight, you can use soy protein products (like soy protein powder, bars, or patties) to help meet your daily protein goals. You do not need to rely exclusively on meat or dairy. The study shows that using three servings of soy protein daily, alongside a calorie-controlled diet and exercise, results in the same amount of fat loss and muscle preservation as using non-soy proteins. This makes soy a flexible and effective tool for vegetarians or anyone wanting to diversify their protein sources.
These results indicate that soy-based protein foods can be effectively incorporated into an energy-restricted, high-protein diet for improving body weight, body composition and cardiometabolic health.
Why this rating
Randomized controlled trial with a non-inferiority design, though limited by a relatively small sample size (n=71) and lack of blinding.
Source
Effects of consuming a high‐protein diet with or without soy protein during weight loss and maintenance: a non‐inferiority, randomized clinical efficacy trial
Kristin J. Speaker et al. · Obesity Science & Practice · 2018
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