The Claim

In healthy young men undergoing 12 weeks of resistance training, pre-sleep protein supplementation leads to a significantly greater increase in quadriceps muscle cross-sectional area compared to placebo, with an average gain of +8.4 ± 1.1 cm² versus +4.8 ± 0.8 cm² (P < 0.05).

Source: Protein Ingestion before Sleep Increases Muscle Mass and Strength Gains during Prolonged Resistance-Type Exercise Training in Healthy Young Men.

What the research says

Supports is higher

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

Supports
61score
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

If young guys eat protein before bed while lifting weights for 12 weeks, they gain more leg muscle than those who don’t — about twice as much, according to one study.

See the scientific wording

Pre-sleep protein supplementation results in a greater increase in quadriceps muscle cross-sectional area during 12 weeks of resistance training in healthy young men, with an average gain of +8.4 ± 1.1 cm² compared to +4.8 ± 0.8 cm² in the placebo group (P < 0.05).

What the research says

1 study

  1. Study: Protein Ingestion before Sleep Increases Muscle Mass and Strength Gains during Prolonged Resistance-Type Exercise Training in Healthy Young Men.

    The study gave protein to men before bed during 12 weeks of weight training and found their leg muscles grew more than those who didn’t get protein — exactly what the claim says.

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.