The Claim

In young adult males undergoing energy deficit, consuming essential amino acids at doses of 0.1 g/kg or 0.3 g/kg produces equivalent rates of mixed muscle protein synthesis at rest and following resistance exercise.

Source: Effects of high versus standard essential amino acid intakes on whole-body protein turnover and mixed muscle protein synthesis during energy deficit: A randomized, crossover study.

What the research says

Supports is higher

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

Supports
72score
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.

Cause and effect
1 study reviewed
In plain English

In young men eating fewer calories than they burn, taking either a low or high dose of essential amino acids results in the same rate of muscle protein synthesis during rest and after weight training.

See the scientific wording

In young adult males undergoing energy deficit, consuming standard or high doses of essential amino acids (0.1 g/kg or 0.3 g/kg) results in similar rates of mixed muscle protein synthesis at rest and after resistance exercise, indicating that increasing EAA intake beyond 0.1 g/kg does not further stimulate muscle protein synthesis during underfeeding.

Why this might work

When young men eat less food than they need, their muscles reach a maximum rate of protein building with a standard dose of essential amino acids. Giving them more amino acids does not make their muscles build protein any faster, because the muscle cells are already using all the amino acids they can for protein production. The extra amino acids go to other parts of the body and help reduce overall protein breakdown, but they do not increase muscle protein synthesis beyond the standard dose.

Verified mechanismbased on 1 study

What the research says

1 study

  1. Study: Effects of high versus standard essential amino acid intakes on whole-body protein turnover and mixed muscle protein synthesis during energy deficit: A randomized, crossover study.

    In young men eating less food than they need, taking more essential amino acids than the standard dose doesn’t make their muscles grow faster — even though their body overall uses protein better. The extra amino acids help the whole body, but not the muscles more than the regular dose.

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

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