Product Name: ON Glutamine Powder Form: Powder, 630 g (approximately 126 servings) Ingredients and Usage Recommendations: Optimum Nutrition Glutamine Powder is a pure, unflavored L-glutamine supplement designed to support recovery, muscle preservation, and immune function. It is formulated for serious athletes, strength trainers, endurance performers, and physically active individuals who experience frequent training-induced stress and muscle breakdown. Glutamine is the most abundant free amino acid in the human body and plays a vital role in protein metabolism, immune health, nitrogen transport, and intestinal function. During periods of intense physical activity or stress, glutamine levels in muscle tissue may be significantly reduced, which can impair recovery and performance. Supplementation helps restore glutamine stores and promotes optimal recovery. Ingredients (listed by weight in descending order, Latin names):
L-Glutaminum (100% pure L-Glutamine)
Other Ingredients: None No fillers, sweeteners, flavors, or artificial additives. This product is micronized for improved solubility. Usage Recommendations: Mix 1 scoop (approximately 5 g) with 200–250 ml of water, juice, or your post-workout shake. Consume 1 to 3 servings per day depending on physical activity level, with the most effective timing being:
Immediately post-workout
Between meals
Before bed
Glutamine may also be consumed on rest days to support recovery and reduce muscle soreness. Daily Dosage: 5–15 g per day (1–3 servings) Product Benefits:
Supports Muscle Recovery:
Intense training can reduce glutamine levels in muscle cells by up to 50%, which delays recovery and increases the risk of catabolism. Supplementing with ON Glutamine helps restore intracellular levels, promoting faster recovery, reduced soreness, and improved muscle tissue repair.
Preserves Lean Muscle Mass:
During calorie restriction, illness, or prolonged physical exertion, glutamine supplementation helps prevent muscle breakdown by acting as a nitrogen donor. This is particularly important during cutting phases, endurance events, or overtraining periods.
Immune System Support:
Glutamine is a critical fuel source for immune cells, especially during physical or metabolic stress. It contributes to the maintenance of immune function, making it beneficial during intense training cycles or post-competition recovery.
Digestive Health and Gut Barrier Support:
L-glutamine is a preferred energy source for enterocytes (intestinal lining cells). Regular intake supports gut wall integrity, which is essential for nutrient absorption, reducing permeability, and supporting a healthy inflammatory response.
Unflavored & Versatile:
The powder is completely unflavored and can be added to protein shakes, carbohydrate drinks, BCAA mixes, or standalone in water or juice. It mixes easily and does not interfere with the taste of other supplements.
Micronized for Better Absorption:
ON Glutamine is micronized into fine particles, which improves solubility and absorption in the digestive system. This ensures more efficient delivery to muscle tissue and bloodstream.
Zero Fillers or Additives:
Contains only 100% pure L-glutamine with no unnecessary ingredients. Suitable for clean supplement protocols and sensitive users.
Keto and Vegan-Friendly:
Suitable for a wide range of dietary plans, including low-carb, ketogenic, and vegan regimens. Glutamine is produced via fermentation and is not derived from animal sources.
Who Should Use This Product:
Strength athletes and bodybuilders during bulking or cutting
Endurance athletes requiring immune and recovery support
Individuals on restricted-calorie or low-carb diets
People recovering from illness, injury, or high training volume
Anyone seeking to reduce post-exercise soreness and improve gut integrity
Manufacturer: Optimum Nutrition, USA Warning:
Do not use the food supplement as a substitute for a varied diet.
It is important to follow a varied and balanced diet and lead a healthy lifestyle.
Do not exceed the recommended daily dose; this is a warning not to use the food supplement as a substitute for a varied diet.
Keep out of reach of children.
Not to be used by children.
Not to be used by pregnant or breastfeeding women.
