Thorne
L-Glutamine Powder (Thorne)
Where to Buy
About This Product
Thorne L-Glutamine Powder provides 5 grams of pure L-glutamine per scoop, the most abundant amino acid in the body and the primary fuel source for intestinal epithelial cells. L-glutamine plays a central role in maintaining the integrity of the gut lining by supporting tight junction proteins that prevent unwanted substances from crossing into the bloodstream. Thorne's powder is unflavored, mixes easily into water or smoothies, and is free from gluten, dairy, soy, and artificial additives. The product undergoes Thorne's rigorous four-round testing process and is NSF Certified for Sport.
Why This Is Great for Thyroid Patients
Leaky gut (increased intestinal permeability) is strongly associated with Hashimoto's and other autoimmune thyroid conditions. When the gut barrier breaks down, food particles and bacterial endotoxins enter the bloodstream and trigger immune responses that can cross-react with thyroid tissue. L-glutamine is the most well-studied nutrient for repairing and maintaining the gut lining. For thyroid patients working on gut healing protocols — which many integrative practitioners consider foundational to managing autoimmune thyroid disease — L-glutamine is often the first supplement recommended.
Key Features
- L-Glutamine 5g per scoop
- NSF Certified
- No additives
Selection Criteria
- NSF Certified for Sport
- Pure single ingredient
- Evidence-based for gut repair
- Practitioner-grade
Evidence Level
Multiple high-quality studies support the use of this product for thyroid patients.