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Head-to-head evidence comparison — which supplement is right for you?
Creatine vs Whey Protein: Creatine has the stronger overall evidence (9.5 vs 9/10); they're alternatives for build strength & muscle — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Creatine wins 2 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
Likely helps
11 of 12 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (1)
Outcomes where both Creatine and Whey Protein have evidence — compare verdict strength side-by-side.
5g daily
Any time, Post-workout may have slight advantage
Monohydrate powder
20-40g per serving
Before or after training, Morning, Between meals
Whey Protein Isolate
and 1 more not shown
2-4 weeks
1-2 weeks
First week
2-4 weeks
4-8 weeks
24-48 hours post-workout
Immediate
Within hours of consumption
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).
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
We finally included 78 RCTs (5272 participants) for analyses.
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
Three RCTs, 637 patients with sarcopenia, of combined whey protein, leucine and vitamin D.
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
49 RCTs, 1863 participants: protein supplementation increased 1RM strength (2.49 kg), fat-free mass (0.30 kg) and muscle fibre cross-sectional area during prolonged resistance training.
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.
The points come from one dose-comparison RCT in 48 resistance-trained young men, who took 0, 10, 20 or 40 g of whey protein isolate straight after leg exercise, three hours after a high-protein breakfast (PMID 24257722). Over the next four hours myofibrillar muscle protein synthesis rose 49% above 0 g with 20 g and 56% with 40 g, and 10 g gave no added stimulation. The authors conclude 20 g is enough for the maximal response in about 80 kg men, and 40 g mainly raised amino acid oxidation and urea production. This is an acute measure of protein synthesis, not muscle growth over weeks of training, and the trial did not report tolerability, so no ceiling dose is set.
AI-estimated from published studies. Interpret as directional guidance.
Creatine has a higher evidence score (9.5/10 vs 9/10) and wins in 2 of 3 categories.
For build strength & muscle, Creatine has a higher relevance score (98 vs 95).
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.