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Head-to-head evidence comparison — which supplement is right for you?
Capsaicin vs Whey Protein: they're closely matched on evidence (5 vs 9/10); the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Capsaicin and Whey Protein are closely matched across evidence, studies, and safety.
Verdict
Mostly mechanism / observational
Top outcomes
Verdict
Likely helps
24 of 27 studies with measurable effects showed benefit.
Top outcomes
2-6mg capsaicinoids daily (meta-analysis suggests a minimum of ~2mg to affect energy intake); higher capsinoid doses used for thermogenesis
before-meals
Capsaicinoid extract (capsule)
20-40g per serving
Post-workout (within 2 hours), Morning, Between meals
Whey Protein Isolate
and 1 more not shown
Acute (per dose)
Acute (per meal)
Acute
Throughout use
4-8 weeks
24-48 hours post-workout
Immediate
Within hours of consumption
Could capsaicinoids help to support weight management? A systematic review and meta-analysis of energy intake data.
Appetite (2014) · Meta analysis · n=191
Pooled 8 trials (191 participants), 19 effect sizes
The effect of Capsaicinoids or Capsinoids in red pepper on thermogenesis in healthy adults: A systematic review and meta-analysis.
Phytother Res (2021) · Meta analysis
Pooled 13 placebo-controlled trials
The effects of capsaicin and capsiate on energy balance: critical review and meta-analyses of studies in humans.
Chem Senses (2012) · Meta analysis
Meta-analyses of thermogenic outcomes plus systematic review of appetite outcomes in humans
Comparative Efficacy of Different Protein Supplements on Muscle Mass, Strength, and Physical Indices of Sarcopenia among Community-Dwelling, Hospitalized or Institutionalized Older Adults Undergoing Resistance Training: A Network Meta-Analysis of Randomized Controlled Trials
Nutrients (2024) · Meta analysis · n=5272
Treatment effects for main outcomes were expressed as standard mean difference (SMD) with 95% confidence interval (CI).
Effects of Whey Protein, Leucine, and Vitamin D Supplementation in Patients with Sarcopenia: A Systematic Review and Meta-Analysis
Nutrients (2023) · Meta analysis · n=637
However, appendicular muscle mass significantly improved in the experimental group compared to the control group.
A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength
British Journal of Sports Medicine (2018) · Meta analysis · n=1863
Protein supplementation increases muscle mass gains
Based on multiple meta-analyses with >3000 participants. Effects require concurrent resistance training. Benefits plateau around 30-40g per serving. Isolate forms may reduce digestive issues.
AI-estimated from published studies. Interpret as directional guidance.
Both Capsaicin and Whey Protein are closely matched — the best choice depends on your specific health goals.
No known interactions between Capsaicin and Whey Protein have been documented in our database. However, always consult a healthcare provider before combining supplements.
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The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.