Soy Protein
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A protein isolated or concentrated from soybeans, used as a plant-based protein source in foods and supplements.
Why it’s used
Taken as a source of dietary protein, particularly by people following plant-based diets, and historically marketed with cardiovascular health in mind.
What the evidence is for
cardiovascular benefit specifically; protein nutrition itself is well established.
What the evidence says
Soy protein is recognized as a complete, high-quality protein source. A claim linking soy protein to reduced coronary heart disease risk was authorized by the FDA in 1999 but formally revoked in 2017 after subsequent research produced inconsistent results, and the agency concluded the evidence no longer met the standard for an authorized health claim.
Dose studied
25–25 g — daily intake used in trials underlying the now-revoked FDA heart-health claim.
Context
Clinical trials examining soy protein's cardiovascular effects have used daily intakes in the range of roughly 25 grams per day, though results across studies have been mixed enough that regulators withdrew the associated claim.
Educational information, not medical or safety advice. Consult a professional for allergies or medical concerns.