The Claim

Yeast protein has a higher ratio of indispensable to dispensable amino acids (IAAs/DAAs ratio of 0.91) compared to animal proteins (whey concentrate/isolate) and plant proteins (soy, wheat, pea), as determined in a rat model and in vitro digestion system.

Source: Evaluation of the nutritional quality of yeast protein in comparison to animal and plant proteins using growing rats and INFOGEST model.

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
8score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Quantitative
1 study reviewed
In plain English

Yeast protein contains a higher proportion of essential amino acids relative to non-essential amino acids than animal or plant proteins, with a ratio of 0.91. This finding comes from experiments using rats and lab digestion simulations.

See the scientific wording

Yeast protein exhibits a higher ratio of indispensable to dispensable amino acids (IAAs/DAAs ratio of 0.91) compared to animal proteins (whey concentrate/isolate) and plant proteins (soy, wheat, pea), as measured in a rat model and in vitro digestion system.

Why this might work

Yeast protein has a natural balance of amino acids with a higher proportion of essential amino acids compared to animal and plant proteins, giving it a higher IAA/DAA ratio.

Hypothetical mechanismbased on 1 study

What the research says

1 study
  1. Study: Evaluation of the nutritional quality of yeast protein in comparison to animal and plant proteins using growing rats and INFOGEST model.

    The study found that yeast protein has a better balance of essential amino acids (0.91 ratio) than animal and plant proteins, so the claim is correct.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.