Supplement Recipe Check
L-Glutamine Ingredient Notes
L-glutamine is an amino acid made in the body and used in metabolism, energy production and nitrogen supply for other reactions.
L-glutamine is an amino acid made in the body and used in metabolism, energy production and nitrogen supply for other reactions.
Community experiences
Selected positive personal experiences from external communities, edited and summarized. These accounts do not establish effectiveness.
A contributor who used glutamine capsules when muscle soreness was particularly severe after exercise wrote that they helped with recovery. They explained that they took glutamine only as needed, while taking creatine separately every day. They listed one to two years of use but did not provide the product strength or a comparison at matched exercise levels, so the contributions of the two ingredients to their perceived recovery cannot be separated.
Experience shared by external community contributor A
A contributor who took glutamine tablets wrote that they had more energy left than expected even after walking a lot or a physically demanding day. They felt it seemed more helpful than when they had not taken it and wanted to buy it again. Without a specific dose, duration or comparison at matched activity levels, this remains a perceived difference in everyday fatigue.
Experience shared by external community contributor B
This page is for general reference only and is not medical advice, diagnosis, treatment, or prescription. Ask a qualified professional if you need medical advice or diagnosis.
What is L-Glutamine?
L-glutamine is an amino acid made in the body and used in metabolism, energy production and nitrogen supply for other reactions.
On Supplecipe, you can search iHerb products that mention L-Glutamine and compare single-ingredient products against broader supplement blends.
Evidence and limitations
Some small studies reported improved strength recovery or less soreness after exercise, while others found no difference in strength or body composition. NIH ODS finds insufficient evidence to support taking glutamine alone to improve exercise performance.
Forms and other names
L-glutamine and glutamine refer to this amino acid. Glutamic acid and glutathione are different substances, not alternative names.
Related ingredients
Related reading, not a recommendation to combine supplements.
Side effects and cautions
Persistent digestive symptoms need medical assessment. Discuss liver or kidney disease and medicines with a healthcare professional, and do not copy study doses intended for patients with a medical condition.
How to compare iHerb products
- Read the individual glutamine amount per serving, not the total grams of protein powder or an amino-acid blend. Check the actual scoop weight for powder products.
- Look for form, serving size, extra ingredients, allergens, and whether the product is a single ingredient or a blend.
- Compare brand, price per serving, ingredient form, and single-ingredient versus complex products.
- Use the search button below to compare iHerb products that mention this ingredient.
Editorial revision:
Leave a quick note about this ingredient