100% L-Glutamine 500g

BioTechUSA 100% L-Glutamine — pure glutamine powder for athletes

BioTechUSA 100% L-Glutamine is a high-quality dietary supplement consisting of 100% pure L-glutamine — with no fillers, flavours or other additives. Each 5-gram serving delivers exactly 5000 mg of L-glutamine, the most abundant amino acid in the human body.

L-glutamine accounts for over 60% of the free amino acid pool in skeletal muscle. During intense training, glutamine stores can drop by up to 50%, directly impacting muscle recovery, immune function and overall wellbeing. Regular glutamine supplementation helps maintain this balance and supports faster recovery after hard training sessions.

Although glutamine is a conditionally essential amino acid — the body can synthesise it — endogenous production may not be sufficient during periods of intense physical stress. This makes supplementation particularly beneficial for bodybuilders, endurance athletes and anyone training at high intensity on a regular basis.

Why choose BioTechUSA 100% L-Glutamine?

This product stands out for its exceptional purity. There is nothing in the container except L-glutamine — you know exactly what you are consuming. The unflavoured powder mixes easily with other supplements: protein shakes, BCAA drinks, creatine or fruit juice.

• 5000 mg L-glutamine per serving
• 100% pure product — only L-glutamine, nothing else
• Lactose-free, gluten-free and sugar-free
• Unflavoured — ideal for stacking with other supplements
• Supports muscle recovery after training
• Supports immune system and gut health
• 100 servings per container — up to 50-day supply
• Suitable for vegans

Glutamine's role in gut and immune health

L-glutamine does not only support muscles — it is also the primary energy source for intestinal epithelial cells. Adequate glutamine levels help maintain gut barrier integrity, which is essential for nutrient absorption and protection against digestive issues. Glutamine also fuels immune cells, particularly lymphocytes and macrophages, supporting the body's natural defence mechanisms.

After intense training, glutamine contributes to the replenishment of muscle glycogen stores, speeding up recovery and preparing the body for the next session. This is especially important for athletes who train multiple sessions per day or have short recovery windows between competitions.

Who is it for?

• Bodybuilders and strength athletes looking for a pure amino acid for recovery
• Competitive athletes during preparation and competition phases
• Endurance athletes — runners, cyclists, triathletes
• Anyone who prefers a clean, additive- and flavour-free supplement
• Those looking to support gut health and immune function

Like all BioTechUSA products, 100% L-Glutamine is made from carefully selected, safe ingredients that meet the highest quality standards. BioTechUSA is one of Europe's most recognised sports nutrition brands, sold in over 100 countries.