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Head-to-head evidence comparison — which supplement is right for you?
Beta-Alanine vs Caffeine: they're closely matched on evidence (7.5 vs 9.5/10); they're alternatives for boost daily energy — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Beta-Alanine and Caffeine are closely matched across evidence, studies, and safety.
Verdict
Likely helps
12 of 14 studies with measurable effects showed benefit.
Top outcomes
Verdict
Likely helps
29 of 35 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (1)
Outcomes where both Beta-Alanine and Caffeine have evidence — compare verdict strength side-by-side.
3.2-6.4g daily
Anytime - timing doesn't affect carnosine buildup
CarnoSyn® sustained-release tablets
100-200mg
Morning, 30-60 minutes before exercise
Pill/capsule for precise dosing
2-4 weeks
2-4 weeks
15-30 minutes post-dose
15-45 minutes
30-60 minutes
30-60 minutes
30-60 minutes
Beta-alanine supplementation and exercise performance: A meta-analysis
British Journal of Sports Medicine (2017) · Meta analysis · n=1461
Significant improvement in exercise capacity
ISSN position stand: Beta-alanine
Journal of the International Society of Sports Nutrition (2015) · Review
Increases muscle carnosine by 40-80%
Effects of different dietary supplements on athletic performance in soccer players: a systematic review and network meta-analysis
Journal of the International Society of Sports Nutrition (2025) · Meta analysis
Kaempferia parviflora (SMD: 0.46, small) was associated with a significant effect on enhancing muscular strength.
Effect of Acute Caffeine Intake on the Fat Oxidation Rate during Exercise: A Systematic Review and Meta-Analysis
Nutrients (2020) · Meta analysis · n=2020
A subsequent meta-analysis was performed using the random effects model to calculate the standardized mean difference (SMD).
The effects of caffeine intake on weight loss: a systematic review and dos-response meta-analysis of randomized controlled trials
Critical reviews in food science and nutrition (2019) · Meta analysis · n=606
Thirteen RCTs with 606 participants were included in the meta-analyses.
Effect of Caffeine and Nitrates Combination on Exercise Performance, Heart Rate and Oxygen Uptake: A Systematic Review and Meta-Analysis
Nutrients (2024) · Meta analysis · n=95
The meta-analysis revealed that caffeine and nitrates supplementation (CAF+nitrates) did not enhance performance in time trials (TTs) over the CAF alone (g = -0.06; 95% CI = -0.46 to 0.35; p = 0.78) or nitrates alone (g = 0.29; 95% CI = -0.12 to 0.70; p = 0.17).
Meta-analysis of 1461 subjects showed 2.85% median improvement. Effect size 0.39 overall, with optimal effects at 5.6-6.4g/day. Most effective for 1-4 minute high-intensity efforts. Side effect risk primarily reflects paresthesia (tingling), which is common but harmless.
Based on multiple meta-analyses showing 3-6mg/kg optimal dosing. Performance benefits plateau around 200-300mg with increased jitteriness at higher doses.
AI-estimated from published studies. Interpret as directional guidance.
Both Beta-Alanine and Caffeine are closely matched — the best choice depends on your specific health goals.
For boost daily energy, Caffeine has a higher relevance score (98 vs 50).
No known interactions between Beta-Alanine and Caffeine have been documented in our database. However, always consult a healthcare provider before combining supplements.
Caffeine, citrulline, beta-alanine, creatine — the ingredients that work, at clinical doses (vs fairy dusting).
The honest tier list — proven staples vs situational vs mostly marketing. The hub the other guides feed into.
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Caffeine+L-theanine works; bacopa needs weeks; most "brain pills" are hype. The honest tier list.
The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.