causal
Analysis v1
Strong Support
If you're lifting weights and want to build muscle, eating at least 1.6 grams of protein per kilogram of your body weight every day is the most important thing — and eating even more protein (like 0.5 extra grams per kg) helps you gain a little more muscle on top of that.
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Evidence from Studies
Supporting (1)
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Community contributions welcome
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The effect of protein timing on muscle strength and hypertrophy: a meta-analysis
Systematic Review With Meta-Analysis
Human
2013 Dec 3This study found that it doesn’t matter when you drink your protein shake — what really matters is how much protein you eat in total each day. More total protein means more muscle growth, which matches the claim.
Contradicting (1)
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Community contributions welcome
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The study says eating more protein with weight training helps build muscle, but it doesn’t say exactly how much protein you need or if eating more every 0.5 g/kg makes you grow more muscle.
Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.