Best Amino Acid Supplements

Pure creatine monohydrate, one of the most well-researched supplements in sports science. Supports muscle strength, power output, and emerging research suggests cognitive benefits. Safe for long-term daily use at 3-5 grams per day.

An amino acid found naturally in green tea that promotes calm focus without drowsiness. L-theanine increases alpha brain wave activity, supporting relaxation and stress reduction. Often combined with magnesium and melatonin for improved sleep quality, or paired with caffeine for smooth, jitter-free mental clarity.

Glycine is the simplest amino acid and a key building block for collagen, glutathione, and creatine. Supplementing with glycine supports sleep quality, joint health, and detoxification. Research suggests 3-5 grams before bed can improve sleep onset and next-day cognitive performance.

L-Glutamine is the most abundant amino acid in the body, playing a critical role in gut lining integrity, immune function, and muscle recovery. It supports intestinal barrier health and is commonly used by athletes to reduce exercise-induced immune suppression and accelerate recovery between training sessions.

Complete essential amino acid formula providing all nine EAAs in research-backed ratios. Supports muscle protein synthesis, recovery, and lean body composition with minimal caloric load. Preferred over BCAAs alone because the full EAA profile is required for complete protein turnover and tissue repair.

Taurine is a conditionally essential amino acid concentrated in the brain, heart, and muscles. A landmark 2023 study in Science found that taurine levels decline with age and that supplementation extended lifespan in animal models. It supports cardiovascular function, mitochondrial health, and exercise performance.