Research
Energy balance
Whey protein supplementation does not increase lean mass in studies without energy restriction.
Whey protein may not be effective for increasing lean mass without accompanying energy restriction.
StrongRefutesmedium confidence
There was no effect of WP on lean mass in studies without ER (n = 9 comparisons; 0.22 kg; 95%CI, -0.12 to 0.57).
Why this rating
Based on systematic review and meta-analysis of randomized controlled trials.
Source
Effect of whey protein supplementation on body composition changes in women: a systematic review and meta-analysis
Robert Bergia et al. · Nutrition Reviews · 2018
DOI 10.1093/nutrit/nuy017
Meta-analysisCited 41×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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