The most abundant amino acid in the human body, glutamine is essential for maintaining muscle mass, promoting healthy gut function, and supporting performance.

Product Image Gallery
product detail slide
product detail slide
product detail slide
product detail slide

Performance Nutrition

Glutamine (L-Glutamine) is the most abundant amino acid in the human body. It makes up the majority of your muscles' amino acid pool, and your body uses and depletes it rapidly — especially in active individuals who work out or play sports.

Being that L-Glutamine plays a role in maintaining muscle mass, supporting endurance, promoting gut health; we have to ensure our L-Glutamine reservoirs are nice and topped off. That is difficult to do solely by simply eating amino-rich foods, which is why supplementing with L-Glutamine can be so beneficial.

Support Muscle & Gut Health

Helps Maintain
Muscle Mass



Athlete Training Athlete Carrying Weights Athlete Recovering
Female athelete climbing wall Athlete climbing rope Athletes Stretching

Success is inevitable with solid nutrition

When you put in the work and pay attention to the details, seeing the results you want becomes not a question of if but when. It's just a waiting game. Because when your foundation is strong, adversity doesn't shake it—it merely becomes more brick and mortar to build with.

Glutamine Tub
Informed Sport certified Logo

Informed Sport Certified

Onnit is committed to the highest standards of quality and efficacy. We have already had many of our products independently certified to be competition safe, and we're actively pursuing even more certifications.

Informed Sport is a third-party testing program developed by the world-class anti-doping laboratory, LGC. It is widely regarded as the global gold standard for banned-substances testing in sports nutrition products. Each lot of Onnit products bearing the Informed Sport logo has been rigorously tested for banned substances by the Informed Sport program before it is released for sale.

Glutamine Ingredients & Use

Glutamine Supplement Facts