What Supplements to Take for Muscle Growth? | Evidence-Backed Picks

Only protein and creatine monohydrate have strong evidence for building muscle; most other supplements fall short.

For the full breakdown, see our best Body Supplements For Muscle Growth guide.

Deciding what supplements to take for muscle growth usually ends with the same shortlist. Protein covers the raw material your muscles need, and creatine monohydrate is the most consistently effective compound for adding strength and lean mass during resistance training. Everything else on the market sits a clear step below, and much of it is a waste of money.

The supplement industry pushes dozens of powders and pills, but the official guidance from the NIH Office of Dietary Supplements is blunt: only a few supplements have sound scientific support for exercise and athletic performance claims. This guide covers what actually works, what might help in narrow situations, and what you can skip entirely — so you can spend on what matters and skip the rest.

Protein: The Foundation Of Muscle Growth

Protein is the best-supported nutritional supplement for increasing muscle mass when your total daily intake is inadequate or hard to reach through food alone. For most lifters, a practical translation is roughly 0.3 grams per kilogram of body weight per meal, or about 2–3 grams of leucine equivalents, spread across 3–5 meals each day around your resistance training.

A whey or plant-based protein powder is the most convenient way to close the gap between what you eat and what you need. It is not magic — it simply makes hitting your daily target easier. If you already eat enough protein from whole foods, an extra shake will not add meaningful muscle.

Creatine Monohydrate: The Most Effective Strength Supplement

Creatine monohydrate is one of the most consistently effective supplements for increasing strength and lean mass during resistance training. It is also the most studied sports supplement in existence, and the evidence for its effects is substantially stronger than for anything else on this list.

After that, a maintenance dose of 3–5 grams per day keeps muscle stores saturated. You can skip the loading phase and start with the maintenance dose — it just takes longer to reach full saturation.

Creatine is safe for healthy adults when used as directed. One important caveat: teens should not use performance-enhancing supplements like creatine, per warnings cited by the National Center for Complementary and Integrative Health from the American Academy of Pediatrics and the American College of Sports Medicine.

Beta-Alanine And BCAAs: Limited Or Situation-Specific

Beta-alanine can improve muscle carnosine content and may help high-intensity efforts lasting roughly 1–4 minutes, but it does not consistently add muscle mass or clearly add strength beyond creatine. The typical dose is 4–6 grams per day for about 4 weeks, with some studies using 3.2–6.4 grams daily over 2–10 weeks. A harmless tingling sensation called paresthesia can occur; smaller divided doses may reduce it.

Branched-chain amino acids (BCAAs) are a much weaker choice. The NIH consumer fact sheet states there is not much scientific evidence that BCAAs improve performance, build muscle, or help tired muscles recover. They only offer value if your total daily protein intake is insufficient — in which case you are better off fixing your protein intake directly rather than buying a specialized product.

Research also suggests that stacking creatine with beta-alanine provides limited or no meaningful additive benefit over creatine alone for strength or body composition. You are not getting synergy; you are just buying two powders.