The Impact of Whey and Soy Protein Supplementation on Resistance Training in Young Adults: A Systematic Review and Meta-Analysis

Methodology

Meta-analysis

Population

Young adults; RCTs of whey or soy protein + RT

Intervention

Whey protein + RT vs soy protein + RT vs placebo + RT

Findings

Both whey and soy protein enhanced lean body mass and strength compared to placebo, with minimal differences between them when total protein was adequate — counter-evidence to the 'whey is always superior' narrative.

Outcome measures

Lean body mass, muscle strength

Limitations

Limited head-to-head studies; heterogeneity; varying doses.

Original source

DOI: 10.1080/19390211.2025.2604679 · PMID: 41454445