Klean Glutamine 5000 mg by Klean Athlete

Endurance and high-volume strength athletes who get frequent colds after hard blocks, or who finish sessions with stomach cramping, are the classic fit for glutamine powder. L-glutamine is also reasonable during heavy travel or calorie cuts when recovery lags and protein intake dips. If your training reports show elevated soreness and poor sleep, or your coach flags overreaching, a daily 5 g can help stabilize recovery, especially if you’re not hitting 1.6–2.2 g/kg/day of protein.

Glutamine is a conditionally essential amino acid, meaning your needs outpace your body’s supply under heavy stress. It is the preferred fuel for enterocytes (the gut lining cells) and many immune cells, so topping it up helps maintain the gut barrier and immune function during hard training. In muscle, it carries nitrogen for tissue repair and buffers ammonia (a fatigue-related byproduct). That’s why studies show smaller bumps in creatine kinase (a muscle damage marker) and steadier hs-CRP (a general inflammation marker) in some athletes using it.

Mix one scoop in 8–10 oz of water. Timing is flexible, but most athletes use 5 g right after training or before bed. On very hard days, splitting 5 g twice daily is common. It’s flavor-neutral and fine with or without food. Expect gut comfort and day-after readiness to improve within 1 to 3 weeks. If you already eat ample protein and recover well, more than 5 g/day rarely adds much.

Skip supplemental glutamine if you have severe liver disease with confusion risk (hepatic encephalopathy, a buildup of brain-affecting toxins), significant kidney disease, or you’re on a protein-restricted plan set by your clinician. If you’re being treated for active cancer, ask your oncology team first; glutamine is sometimes used for mouth sores from chemo, but unsupervised use is not advised. Pregnant or nursing: get clinician approval before starting.