Supplements for Muscle Growth: What Works, What's Hype, What's a Waste

Creatine monohydrate is the single most effective muscle-building supplement, backed by over 500 studies showing 5-10% improvements in strength and lean mass. Take 3-5g daily. Every day, not just training days. Loading phases (20g/day for a week) work faster but aren't necessary. Monohydrate is the most studied form. Don't pay extra for "fancy" versions like HCl or buffered creatine. They don't perform better.

Protein powder isn't magic. It's just food. But if you're not hitting 0.7-1g of protein per pound of bodyweight from whole foods, a shake fills the gap. Whey protein absorbs fast and has the highest leucine content (the amino acid that triggers muscle protein synthesis). 25-40g per serving. Timing matters less than total daily intake, but post-workout is fine.

For people who don't do dairy, pea protein blended with rice protein gives you a complete amino acid profile that's close to whey in muscle-building studies.

Beta-alanine (3.2-6.4g daily) buffers acid in your muscles during high-rep work. It improves performance in the 1-4 minute range (think sets of 15-30 reps or sprint intervals). Won't help much with heavy low-rep strength work. The tingling (paresthesia) is harmless. Split your dose to reduce it.

HMB (beta-hydroxy beta-methylbutyrate) at 3g daily may reduce muscle breakdown, especially in beginners or older adults. The evidence is decent for trained individuals during caloric deficits (when you're cutting). Not a game-changer during a bulk.

Caffeine (3-6mg per kg bodyweight, taken 30-60 minutes before training) genuinely improves performance. Strength, power, endurance, even pain tolerance. This isn't hype. But you probably already drink coffee. If so, you're already getting this benefit.

Ashwagandha (600mg KSM-66 daily) has shown modest improvements in strength and muscle size in a few trials. It probably works partly through cortisol reduction, which improves recovery. Not a primary muscle builder, but an interesting addition.

BCAAs (branched-chain amino acids) are the most overhyped supplement in fitness. If you eat enough total protein, BCAAs add nothing. They're already in your whey shake and your chicken breast. A 2017 systematic review confirmed that BCAAs don't stimulate muscle protein synthesis on their own. Save your money.

L-glutamine is the most abundant amino acid in your body. You make plenty of it. Unless you're critically ill or have severe burns, supplementing glutamine won't build muscle. It might help gut health, but that's a different conversation.

Testosterone boosters (tribulus, fenugreek, D-aspartic acid) are largely ineffective. Tribulus has been studied multiple times and does not raise testosterone in healthy men. Fenugreek might slightly improve libido but not actual testosterone levels. Don't waste your money.

Deer antler velvet, HGH precursors, and anything claiming to be a "natural steroid" are marketing fantasy. If it sounds too good to be true, it is.