Soy Protein

Does soy protein work?

What is soy protein?

Few foods evoke greater emotion than soy. It elicits fears of decreased testosterone, less optimal strength, and feminization of masculine features. There’s plenty of misinformation about soy. The truth is there are plenty of health and performance benefits to consuming soy protein with plenty of research to back it up. Read More

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Overall Effectiveness Rating for Soy Protein

The overall effectiveness rating for soy protein is 2 out of 3. This rating means there is some evidence that using soy protein may lead to positive results. This rating also means that some evidence does not back up all claims. Below you can find individual ratings for specific claims.

Overall Confidence Rating for Soy Protein

There are 14 studies in the database on soy protein; the confidence rating is 42. A score above 80 means the effectiveness rating for this supplement is reliable. A score under 80 means there is insufficient evidence to ensure a reliable effectiveness rating. Note, this rating is for soy protein as a whole. There are also individual ratings for the claims below.

Individual Claims

The overall ratings above do no necessarily reflect each claim about soy protein. Individual claims can have higher or lower ratings. For example, some supplements may have a lot of backing for one claim, but be completely useless for another. Click on claims below for more information.

Body Composition (weight, muscle, body fat) Claims Effectiveness Rating Confidence Rating
decrease body fat
increase muscle mass
increase weight loss

Protein Synthesis Claims Effectiveness Rating Confidence Rating
increase protein synthesis

Performance Claims Effectiveness Rating Confidence Rating
increase strength

Hormone Function Claims Effectiveness Rating Confidence Rating
decrease testosterone

Cardiovascular Health Claims Effectiveness Rating Confidence Rating
lower LDL (bad) cholesterol levels
increase HDL (good) cholesterol levels
lower total cholesterol levels

Recovery Claims Effectiveness Rating Confidence Rating
reduce muscle damage