The Short List That Works
According to sports nutrition reviews, only a handful of supplements have strong evidence for building muscle: creatine monohydrate, protein powder, and to a lesser degree HMB and essential amino acids (ISSN exercise and sports nutrition review update).
| Supplement | Evidence | What it does |
|---|---|---|
| Creatine monohydrate | Strong | Boosts strength and muscle gain |
| Protein powder | Strong | Helps you hit daily protein easily |
| HMB | Moderate | Mostly helps beginners and older adults |
| Caffeine | Strong (performance) | Improves training output, not muscle directly |
Creatine: The Top Pick
Creatine monohydrate is the most studied and most effective muscle supplement. Reviews confirm it augments the muscle-growth response to resistance training, and it is well tolerated at 3 to 5 g per day (Journal of the International Society of Sports Nutrition, 2021). No loading phase is required.
Protein Powder: A Convenience, Not Magic
Protein powder does not build muscle by itself. It just makes hitting your daily protein target easier. Total protein of 1.6 to 2.2 g per kg is what matters, whether it comes from food or a shake (Morton et al., 2018, British Journal of Sports Medicine).
What to Skip
Many popular products have little or no evidence for muscle growth. Reviews found that chromium, vanadyl sulfate, boron, and DHEA do not meaningfully increase lean mass (Critical Reviews in Food Science and Nutrition). Vitamin D supplementation also showed no effect on muscle gain in people who are not deficient (Journal of Human Kinetics, 2024).
The Honest Bottom Line
Supplements are the small stuff. Proteins remain the most efficient supplement for muscle mass, with creatine as the best add-on (Journal of Human Kinetics, 2024). Everything else is a rounding error compared to training and total protein.
Key Takeaways
- Creatine monohydrate (3 to 5 g/day) is the top muscle supplement.
- Protein powder helps you hit your daily protein, nothing more.
- HMB and caffeine have narrower, situational benefits.
- Most other muscle supplements are not worth the money.
Frequently Asked Questions
What is the best supplement for muscle growth?
Creatine monohydrate. It has the strongest evidence and is safe at 3 to 5 g per day.
Do I need protein powder to build muscle?
No. It is a convenient way to hit your protein target, but food works just as well.
Are mass gainers or test boosters worth it?
Usually not. Most have little evidence for muscle growth compared to creatine and adequate protein.
Does vitamin D help build muscle?
Not in people who are not deficient. A meta-analysis found no effect on muscle gain or strength.
Spend on training, not powders
The biggest gains come from how you train, not what you buy. ROMRx+BodyBuilding builds your lifts around your range of motion.
Start Free →Sources
- ISSN exercise and sports nutrition review update: research and recommendations. openscience.ink
- Antonio J, et al. Common questions and misconceptions about creatine supplementation. JISSN, 2021. pmc.ncbi.nlm.nih.gov/PMC7871530
- Morton RW, et al. Protein supplementation meta-analysis. British Journal of Sports Medicine, 2018. mendeley.com
- Dietary Supplements to Optimize Skeletal Muscle Growth. Journal of Human Kinetics, 2024. pmc.ncbi.nlm.nih.gov/PMC11057611
ROMRx+BodyBuilding provides training and nutrition education, not medical advice. Talk to a qualified professional before making major changes to your diet, supplements, or training.