The Claim
Yeast protein powder has a protein digestibility-corrected amino acid score (PDCAAS) of 1.14, which is higher than that of legume protein powders (0.76–1.03) and casein (1.12), indicating that its protein quality is comparable to or better than the gold-standard animal protein casein based on in vitro digestibility and amino acid profile.
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.
Yeast protein powder has a protein quality score of 1.14, which is higher than legume powders (0.76–1.03) and even casein (1.12), making it as good or better than the animal protein standard. These results come from lab-based digestibility and amino acid tests.
See the scientific wording
Yeast protein powder has a protein digestibility-corrected amino acid score (PDCAAS) of 1.14, surpassing both legume protein powders (0.76–1.03) and casein (1.12), indicating that its protein quality is comparable to or better than the gold-standard animal protein casein based on in vitro digestibility and amino acid profile.
When you eat yeast protein, your stomach and intestines break it down into tiny pieces called amino acids. These amino acids are then taken into your blood. Because yeast protein breaks down completely and has all the amino acids your body needs, it gets a high protein quality score.
What the research says
1 studyThe study tested yeast protein and found it has a protein quality score of 1.14, which is higher than scores for bean proteins and even higher than milk protein, just like the claim says.
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.