Primary fuel for the cells lining the small intestine.

Since 1984, Thorne has set the standard for the exceptional formulation and quality manufacturing of nutritional supplements. Thorne delivers premium, science-bas...

Buy Now From Amazon

Product Review

Primary fuel for the cells lining the small intestine.

Since 1984, Thorne has set the standard for the exceptional formulation and quality manufacturing of nutritional supplements. Thorne delivers premium, science-based products, a health diagnostics technology platform, and the latest in medical education. With more than 350 products, Thorne is the most dispensed brand by 30-40 year old health-care practitioners. Thorne is dedicated to improving the health of our community as well as increasing the knowledge of nutritional health and wellness. Since 2012, Thorne has partnered with educational institutes and local charities to donate more than $1M in products and profits.

Thorne products do not contain any unnecessary binders, coatings, disintegrants, fillers, or lubricants (including magnesium stearate) that could impair absorption. Thorne adheres to the FDA's current Good Manufacturing Practices (cGMPs) and has the highest number of NSF Certified for Sport products which tests for more than 200 banned substances for elite athletic competitions.

  • GI Health: A single-amino acid formula that helps maintain gut permeability and a healthy lining to the gastrointestinal tract, which is the body's greatest user of glutamine*
  • Exercise Recovery: Promotes collagen formation to maintain joint strength, and helps to restore plasma glutamine levels, which are often depleted after periods of physical stress, such as prolonged athletic training*
  • Immune Function: Helps maintain optimal health throughout the body when faced with occasional stress or an insufficient diet*
  • Third-Party Certified: This product has been third-party tested and certified to verify what's in the package matches what's on the label and to confirm it contains no unsafe levels of contaminants
  • Trusted: Thorne is chosen by champions and trusted by 100+ professional sports teams, a proud partner of U.S. National Teams, and the #1 recommended clinical brand by health-care practitioners (2023 Health-Care Practitioner Seller Survey)

Similar Products

Thorne Research - L-Lysine - Essential Amino Acid for Skin Health, Energy Production, and Immune Function - 60 CapsulesThorne Research - GI-Encap - Botanical Supplement for GI Tract Support - 180 CapsulesThorne Research - L-Tyrosine - Amino Acid Supplement to Support Production of Dopamine and Norepinephrine - 90 CapsulesThorne Research - Vitamin D-5000 - Vitamin D3 Supplement (5,000 IU) for Healthy Bones and Muscles - NSF Certified for Sport - 60 CapsulesThorne Research - Stress B-Complex - Vitamin B Complex for Stress Support - 60 CapsulesThorne Research - Beta Alanine-SR with CarnoSyn - Sustained-Release Amino Acid for Muscle Endurance - NSF Certified for Sport - 120 TabletsThorne Research - NAC (Formerly Cysteplus) - N-Acetylcysteine for Liver Support, Detoxification, and Immune Function - 90 CapsulesThorne Research - L-Carnitine - Amino Acid Supplement to Support Fat Metabolism and Energy Production - 60 CapsulesThorne Research - Glutathione-SR - Sustained-Release Glutathione for Antioxidant Support - 60 CapsulesThorne Research - Vitamin C with Flavonoids - Blend of Vitamin C and Citrus Bioflavonoids from Oranges, The Way They're Found Together in Nature - 180 Capsules