Supplements for Lifters: What Works, What Doesn’t, What to Skip
Only a few supplements have strong evidence for lifters: creatine monohydrate (3–5 g per day), caffeine (3–6 mg per kg before training) and protein powder as a convenient way to reach your daily protein target. Most others are optional at best.
General education, not medical advice. AI-assisted research and drafting, human-edited and checked against the cited sources. How we work.
Key takeaways
- Creatine, caffeine, and protein powder are the best-supported few.
- Take 3–5 g creatine daily — loading is optional.
- Fat-burners and 'test boosters' rarely earn their price.
- Supplements are not pre-approved — choose NSF Certified for Sport or Informed Sport products.
- Fix food first; supplements only fill genuine gaps.
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The short list actually worth taking
Three supplements have strong evidence. Creatine monohydrate (3–5 g daily) is the most researched, safe, and effective for strength and size, per the ISSN Position Stand — Creatine (JISSN). Protein powder is a convenient way to hit your target when whole food is impractical. Caffeine (roughly 3–6 mg/kg pre-workout) improves performance in many studies, though not all. That's essentially the evidence-backed core.
| Supplement | Evidence | Typical dose | Notes |
|---|---|---|---|
| Creatine monohydrate | Strong | 3–5 g/day (optional loading 0.3 g/kg/day for 5–7 days) | Most researched ergogenic aid; safe in healthy people (Kreider et al., 2017) |
| Caffeine | Strong | 3–6 mg/kg about 60 min before training | Higher doses add side effects, not benefit (Guest et al., 2021) |
| Protein powder | Strong as food | Whatever closes your daily protein gap | A convenient protein source, not a separate effect (Morton et al., 2018) |
| BCAAs | Weak if protein is adequate | — | Editorial view: unnecessary when daily protein is met with complete sources |
| Test boosters, fat burners | Poor | — | Skip; higher contamination and safety concerns |
How to use creatine
Skip the loading drama: 3–5 g every day, any time, indefinitely. It draws water into muscle and improves high-intensity performance and recovery over weeks. The Kreider et al. (2017) ISSN creatine position stand and ISSN both affirm its safety in healthy adults. Pick plain creatine monohydrate — the fancy forms cost more for no added benefit.
Worked example: caffeine dose for a 75 kg lifter
3–6 mg/kg × 75 kg = 225–450 mg. A typical coffee contains well under that, so start at the low end (about 225 mg) and only move up if you tolerate it. Avoid it within several hours of bedtime if it affects your sleep.
What to skip or treat with skepticism
Fat burners, testosterone boosters, BCAAs (redundant if you eat enough protein), and most 'pump' and 'recovery' blends deliver little for the money. If a product promises a dramatic shortcut, that's your cue to walk away. Food, training, and sleep do the heavy lifting.
Safety and quality
Supplements aren't pre-approved by the FDA, so choose third-party tested products (NSF Certified for Sport, Informed Sport) — especially if you compete and face drug testing. Tell your doctor what you take, and be cautious with stimulants if you have heart concerns or high blood pressure.
If you compete in a drug-tested sport, choose products certified by a third-party testing programme such as Informed Sport or NSF Certified for Sport, which batch-test for banned substances.
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Common questions
Is creatine safe and worth taking?
Yes. Creatine monohydrate is among the most studied supplements, with a strong safety record in healthy adults and clear benefits for strength and muscle. Take 3–5 g daily.
Do I need BCAAs?
Almost certainly not. If you eat enough total protein, BCAAs add little. The money is better spent on quality food or creatine.
Are pre-workouts necessary?
No. Their main active ingredient is caffeine, which you can get more cheaply from coffee. Pre-workouts are optional convenience, not a requirement for progress.
Do I need to load creatine?
No. A daily 3–5 g dose saturates your muscles in about three to four weeks. Loading (~20 g/day for a week) just gets you there faster and can cause stomach upset. Steady daily dosing is simpler and just as effective.
Limitations of this guide
Supplement studies are often short and use small groups. Supplements are not regulated like medicines in most countries, so the label may not match the contents. Speak to a doctor first if you take medication, are pregnant, or have a heart condition.
References
- Kreider RB, Kalman DS, Antonio J, et al. (2017). 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, 14, 18. PubMed (opens in a new tab)
- Guest NS, VanDusseldorp TA, Nelson MT, et al. (2021). International Society of Sports Nutrition position stand: Caffeine and exercise performance. Journal of the International Society of Sports Nutrition, 18, 1. PubMed (opens in a new tab)
- Morton RW, Murphy KT, McKellar SR, et al. (2018). 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, 52(6), 376–384. PubMed (opens in a new tab)
Related tool: Protein Calculator. A daily protein range in grams for gaining, cutting or maintaining, split across your meals.
Open the protein calculatorRelated guides
This guide is general fitness education and does not replace advice from a doctor, registered dietitian or qualified coach. Stop any exercise that causes sharp pain. See the full disclaimer.