The Claim
The in vitro digestible indispensable amino acid score (DIAAS) of soymilk and tofu is comparable to each other and higher than that of cooked soybeans, indicating that traditional processing methods increase the nutritional adequacy of soy protein for human dietary needs under laboratory conditions.
What the research says
Roughly balanced
Support and challenge are close. The picture may shift as more studies come in.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Soymilk and tofu have higher amino acid scores than cooked soybeans in laboratory tests, meaning they provide more usable protein for human nutrition after traditional processing.
See the scientific wording
The in vitro digestible indispensable amino acid score (DIAAS) of soymilk and tofu is comparable and exceeds that of cooked soybeans, suggesting that traditional processing methods enhance the nutritional adequacy of soy protein for human dietary needs under laboratory conditions.
When soybeans are turned into soymilk and tofu, heat and physical processing break down the protein structure and remove compounds that block digestion. This lets the body access more of the essential amino acids, making the protein more usable.
What the research says
1 studyTurning soybeans into soymilk and tofu makes their protein easier for the body to use, according to lab tests — plain cooked soybeans don’t measure up as well. So, processing soy improves its protein quality.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.