Soy protein is a plant-based complete protein derived from soybeans. It contains all nine essential amino acids and is widely used as an alternative to animal-based proteins like whey or casein.
For individuals engaged in physical activity—especially vegetarians or those with lactose intolerance—soy protein offers a high-quality, muscle-supporting protein source. It aids in muscle recovery and growth and can support lean body mass when consumed post-exercise.
Soy protein also contains isoflavones, which may influence cholesterol levels and antioxidant defenses, although their hormonal effects are still under research.
Synonyms:
Soy protein isolate, Soy protein concentrate
Benefits:
- Supports muscle repair and growth
- Complete protein source for vegetarians/vegans
- Promotes lean muscle mass
- May help lower cholesterol (based on some evidence)
Sources:
Extracted from soybeans, especially defatted soy flour.
Observations:
Available in powder or bar form. Generally well tolerated, though individuals with soy allergies should avoid it. Excessive intake of soy isoflavones may have hormonal effects in sensitive individuals.
Areas of Study Related:
Nutrition, Exercise Physiology, Plant-Based Dietetics, Endocrinology.