Amino Acids

Support your recovery and replenish your body with Natural Factors Micronized L-Glutamine. After physical activity or stress, your L-Glutamine levels are depleted, making it difficult to recover quickly. Our formula replenishes this essential amino acid...

Micronized L-Glutamine supports muscle tissue and mass after physical activity and immune system function. Micronized technology greatly minimizes the particle size, allowing higher absorption. Natural Factors amino acids are the highest quality...

L-Arginine supports muscle metabolism and also is required in the formation of nitric oxide, a compound involved in the circulatory system. Natural Factors amino acids are the highest quality pharmaceutical grade products available. Country of Origin:...

L-Arginine supports muscle metabolism and also is required in the formation of nitric oxide, a compound involved in the circulatory system. Natural Factors amino acids are the highest quality pharmaceutical grade products available. Country of Origin:...

L-Arginine supports muscle metabolism and also is required in the formation of nitric oxide, a compound involved in the circulatory system. Natural Factors amino acids are the highest quality pharmaceutical grade products available. Country of Origin:...

NAC (N-Acetyl-L-Cysteine) is a highly stable form of cysteine that provides antioxidant support and is especially beneficial for active people, the elderly and those exposed to polluted environments.* Natural Factors amino acids are the highest quality...

Acetyl-L-Carnitine helps transform fats into energy and promotes normal and healthy brain function, including memory and concentration. It also supports normal muscle movement. Natural Factors amino acids are the highest quality pharmaceutical grade...

Supplementing with 5-HTP provides natural support for emotional well-being, and our time-release caplets minimize gastric discomfort and optimize absorption. Natural Factors amino acids are the highest quality pharmaceutical grade products available...

Supplementing with 5-HTP provides natural support for emotional well-being, and caplets are enteric coated to minimize gastric discomfort and optimize absorption. Natural Factors amino acids are the highest quality pharmaceutical grade products available...

Reduce stress to feel calm and relaxed with Stress-Relax Suntheanine. This supplement contains L-Theanine, an amino acid found in green tea. L-Theanine supports a tranquil mind for overall relaxation, helping you feel at ease. Our proprietary...

Stress-Relax Suntheanine L-Theanine from Natural Factors provides fast-acting support for a relaxed and calm state of mind. Formulated with 125 mg of Suntheanine, a pure source of L-Theanine, which is thought to help increase alpha brain waves, which in...

L-Lysine 1000mg + Quercetin 250mg Supplement, 240 Capsules, Free Form, 4-in-1 Lysine Complex, Quercetin with Vitamin C and Zinc | Immune Support | Promote Lips & Skin Health Key Features: NatureBell rare double strength best lysine supplement. Cultivated...

Wellness isn't just about dieting and exercise - it's about nutrition and what we put in our bodies. In today's age of processed foods and hectic lifestyles, it can be difficult to give the body all the nutrients it needs. Country of Origin:...

NEW Look, Same Powerful Formula. Leaky Gut Defense features five specialized ingredients for enhanced gastrointestinal support. L-Glutamine, the most abundant free form amino acid in the body, is very important for maintaining gastrointestinal and...

Purity is our Priority Our purity is our promise. At Pure TheraPro Rx, we believe whats not included is just as important as what is. Best-Selling Solutions Visit the Store Pure TheraPro Rx formulates and produces the finest...

Purity is our Priority Our purity is our promise. At Pure TheraPro Rx, we believe whats not included is just as important as what is. Best-Selling Solutions Visit the Store Pure TheraPro Rx formulates and produces the finest...

SUPERIOR VASOLIDATION L-Arginine is an amino acid that helps the body produce energy. It is important for heart and brain function and many other body processes. L-Arginine is an important precursor of Nitric Oxide.* Country of Origin:...

BRAIN FUNCTION SUPPORT All-natural energy enhancer supports improvement of memory and focus. Helps to mobilize stored fat and enhances brain health. Helps support athletic performance, stamina, and cardiovascular health. Country of Origin:...

AMINO ACID SUPPORT NAC is a stable form of non-essential amino acid cysteine. NAC helps facilitate essential biological functions by bonding with two other amino acids, glutamine and glycine to create a powerful antioxidant known as glutathione...

Supersmart is a family owned company founded in 1992. It comes from the idea that people can live smarter and healthier when they properly take care of themselves. Our mission and commitment have remained the same: prioritizing quality, safety, efficacy,...