Research
Cellular
Whey protein supplementation resulted in a greater increase in vastus lateralis muscle thickness (8.4 ± 2.5%) compared to leucine-matched collagen peptides (5.6 ± 2.6%) after a 10-week resistance training program.
Practitioners should consider whey protein as a more effective supplement for increasing muscle thickness in untrained individuals.
StrongSupportsmedium confidence
The WP group experienced a greater (interaction, p < .05) increase in the vastus lateralis... (% Δ, WP = 8.4 ± 2.5 vs. CP = 5.6 ± 2.6%)
Why this rating
Based on the randomized controlled trial design.
Source
Whey Protein Supplementation Is Superior to Leucine-Matched Collagen Peptides to Increase Muscle Thickness During a 10-Week Resistance Training Program in Untrained Young Adults
Jeferson Lucas Jacinto et al. · International Journal of Sport Nutrition and Exercise Metabolism · 2022
DOI 10.1123/ijsnem.2021-0265
rct · n=22Cited 16×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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