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Evidence-Based Supplement Research
Evidence-Based Supplement Research

Whey Protein and Reduced Interleukin-6 Levels

Research synthesisLow evidenceSmall effect3 studies · 1 beneficial · 2 neutral · 0 harmful

Across 3 studies, 1 reported a beneficial small-sized effect on reducing interleukin-6 levels, while 2 found neutral effects (no significant reduction). The sole beneficial study was a large meta-analysis in older adults with sarcopenia (n=1154), which reported a significant small effect. The median study duration was 56 days (based on 1 study), though limited duration data prevents strong conclusions about timing. The most studied population was clinical (sarcopenia, frailty, hemodialysis patients).

  • Studied populations: older adults with sarcopenia, hemodialysis patients, individuals with sarcopenia and pre-frailty

Caveats: Evidence base is small (only 3 studies) — conclusions should be considered preliminary. Only one study reached statistical significance; the two neutral studies did not find a significant IL-6 reduction, so the effect may be inconsistent or limited to specific populations. The beneficial effect was observed in a meta-analysis of sarcopenic older adults; it is unclear whether the same benefit extends to other groups.

Generated Jun 11, 2026
Doses used in studies
  • g/day: 20 (median 20, IQR 2020) 1 study
Time to effect
Median: 8 weeks · IQR 8 weeks8 weeks · Range 8 weeks8 weeks — Reported in 1 of 3 studies
3 of 3 papers
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