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Head-to-head evidence comparison — which supplement is right for you?
Citrulline Malate vs HMB: HMB has the stronger overall evidence (6 vs 6/10); they're alternatives for athletic performance — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
HMB wins 1 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
3 of 4 studies with measurable effects showed benefit.
Top outcomes
Verdict
Probably helps
8 of 13 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (1)
Outcomes where both Citrulline Malate and HMB have evidence — compare verdict strength side-by-side.
6-8g citrulline malate pre-workout
30-60 minutes before exercise, Empty stomach or with light carbs
Citrulline Malate 2:1 powder
3g daily
Split into 1g doses 3x daily, Or all at once with a meal
HMB-Ca (calcium salt) capsules or powder
Acute (within session)
Acute
24-48 hours
Acute
4-8 weeks
N/A
1-2 weeks
Acute Effect of Citrulline Malate on Repetition Performance During Strength Training: A Systematic Review and Meta-Analysis
International Journal of Sport Nutrition and Exercise Metabolism (2021) · Meta analysis · n=137
Small ergogenic effect (SMD=0.196)
Impact of Chronic Nitrate and Citrulline Malate Supplementation on Performance and Recovery in Spanish Professional Female Soccer Players: A Randomized Controlled Trial
Nutrients (2025) · Rct · n=60
Plasma NO3- concentrations significantly increased from baseline in the NIT + CM group and remained elevated 24 h after the final dose, confirming sustained systemic exposure.
Effects of Acute Citrulline Malate Supplementation on CrossFit(®) Exercise Performance: A Randomized, Double-Blind, Placebo-Controlled, Cross-Over Study
Nutrients (2024) · Crossover · n=21
The results indicated no significant difference in the number of rounds completed between the CM and placebo conditions (13.5 ± 5.2 vs. 13.8 ± 6.7 rounds, respectively; p = 0.587).
Nutritional interventions for treating foot ulcers in people with diabetes
The Cochrane database of systematic reviews (2020) · Meta analysis · n=629
It is also uncertain whether arginine, glutamine and β-hydroxy-β-methylbutyrate supplement increases the proportion of ulcers healed at 16 weeks compared with placebo (RR 1.09, 95% CI 0.85 to 1.40).
β-Hydroxy-β-methylbutyrate and its impact on skeletal muscle mass and physical function in clinical practice: a systematic review and meta-analysis
The American journal of clinical nutrition (2019) · Meta analysis · n=2137
Effect sizes were small.
Dietary Supplementation on Physical Performance and Recovery in Active-Duty Military Personnel: A Systematic Review of Randomized and Quasi-Experimental Controlled Trials
Nutrients (2024) · Systematic review
Nutrition supplementation may have small benefits on muscle performance and recovery in warfighters.
Meta-analysis showed small effect (SMD=0.196) with ~3 additional reps. Several individual studies showed mixed results including null findings. Effect appears inconsistent across different exercise modalities.
Meta-analyses show small but significant effects on total body mass and fat-free mass. Effect sizes are consistently reported as 'small' (ES ~0.21-0.22). Multiple studies show no significant effects in older adults or sarcopenia patients. HMB-FA form may have superior bioavailability to HMB-Ca.
AI-estimated from published studies. Interpret as directional guidance.
HMB has a higher evidence score (6/10 vs 6/10) and wins in 1 of 3 categories.
For athletic performance, Citrulline Malate has a higher relevance score (85 vs 65).
No known interactions between Citrulline Malate and HMB have been documented in our database. However, always consult a healthcare provider before combining supplements.
The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.