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Head-to-head evidence comparison — which supplement is right for you?
Creatine vs Tyrosine: Creatine has the stronger overall evidence (9.5 vs 6/10); they're alternatives for sharpen focus — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Creatine wins 3 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
8 of 10 studies with measurable effects showed benefit.
Top outcomes
Verdict
Too few graded studies
Top outcomes
Shared outcomes (2)
Outcomes where both Creatine and Tyrosine have evidence — compare verdict strength side-by-side.
5g daily
Any time, Post-workout may have slight advantage
Monohydrate powder
500-2000mg (a typical label dose, not the dose used in the cited trials, which used 2 g five times a day for a week, or a single 100 mg per kg dose)
30-60 minutes before stressful activity, On empty stomach for best absorption
L-Tyrosine powder or capsules
2-4 weeks
1-2 weeks
First week
2-4 weeks
30-60 minutes
30-60 minutes
30-60 minutes
Risk of Adverse Outcomes in Females Taking Oral Creatine Monohydrate: A Systematic Review and Meta-Analysis
Nutrients (2020) · Meta analysis · n=951
Six hundred and fifty-six studies were identified where creatine supplementation was the primary intervention; fifty-eight were female only studies (9%).
International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine
Journal of the International Society of Sports Nutrition (2017) · Systematic review
Increases strength by 5-15%
Effects of Creatine Supplementation and Resistance Training on Muscle Strength Gains in Adults <50 Years of Age: A Systematic Review and Meta-Analysis
Nutrients (2024) · Meta analysis · n=509
In comparison with a placebo, creatine supplementation combined with resistance training significantly increased upper-body (WMD = 4.43 kg, p < 0.001) and lower-body strength (WMD = 11.35 kg, p < 0.001).
Tyrosine promotes cognitive flexibility: evidence from proactive vs. reactive control during task switching performance
Neuropsychologia (2015) · Rct · n=22
Tyrosine supplementation improved task switching performance under demanding conditions
Effect of tyrosine supplementation on clinical and healthy populations under stress or cognitive demands: A review
Journal of Psychiatric Research (2015) · Review
Converging evidence for cognitive enhancement under demanding conditions
The effect of tyrosine supplementation on whole-body endurance performance in physically active population: A systematic review and meta-analysis including GRADE qualification.
Journal of sports sciences (2023) · Meta analysis
No significant difference vs placebo for time to exhaustion (SMD = 0.02; p = 0.94)
The 5 g point is a crossover trial in 123 adults taking 5 g a day for 6 weeks (PMID 37968687): the effect on backward digit span only bordered significance (p = 0.064), reasoning (Raven's matrices) did not change, and side effects were 4.25 times more common than on placebo. The 20 g point is a one-week trial of 5 g four times a day in 32 older adults, where most memory tasks improved (PMID 17828627). A meta-analysis of 10 trials found a small memory benefit (SMD 0.29), mostly in adults aged 66 to 76, with no effect of dose across 2.2 to 20 g a day (PMID 35984306), so the curve is flat. The two trials differ in age and length as well as dose. No minimum or optimal dose is established.
AI-estimated from published studies. Interpret as directional guidance.
Creatine has a higher evidence score (9.5/10 vs 6/10) and wins in 3 of 3 categories.
For sharpen focus, Tyrosine has a higher relevance score (80 vs 70).
No documented interaction was found in the data searched. This does not establish that this exact combination is safe.
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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.