Best Supplements to Build Strength & Muscle

Leucine metabolite that helps prevent muscle breakdown and supports recovery, especially during caloric restriction or intense training.

Builds ~0.6 kg of muscle (lean body mass)· Strong evidence

Complete essential amino acid blend that maximizes muscle protein synthesis — superior to BCAAs alone.

Gains ~1.2 kg of fat-free mass· Moderate evidence

Complete protein with high leucine content that maximizes muscle protein synthesis — most researched protein supplement worldwide.

Builds ~1 kg of muscle (lean body mass)· Weak evidence

Proven ergogenic aid that buffers lactic acid, extending high-intensity exercise capacity by 1-3%.

Gains ~0.6 kg of fat-free mass· Weak evidence

Leucine, isoleucine, and valine metabolized directly in muscle tissue — support protein synthesis and reduce exercise fatigue.

Gains ~0.5 kg of fat-free mass· Weak evidence

Hormone-like vitamin that regulates 1,000+ genes — deficiency is widespread and linked to poor immunity, depression, and bone loss.

Gains ~0.2 kg of fat-free mass· Weak evidence

Forms a stomach gel for 6-8 hours of sustained amino acid release — ideal for overnight muscle recovery and anti-catabolism.

Weak evidence

Increases phosphocreatine stores for faster ATP regeneration, boosting strength, power output, and cognitive function under stress.

Weak evidence

Traditional herb with evidence for supporting testosterone, libido, blood sugar control, and lactation.

Weak evidence

Increases muscle carnosine to buffer acid during high-intensity exercise, extending endurance for 1-4 minute efforts.

Weak evidence