L-Glutamine, an amino acid for athletes
Our L-Glutamine page brings together our advice on this amino acid: its abundance in the body, its role in muscle, the immune system, and the gut, what studies really say about recovery and performance, and situations where supplementation may make sense.
A plentiful and versatile amino acid.
The most abundant in the body
Glutamine is the most abundant amino acid in the human body, found in large quantities in the muscles and blood. It is said to be conditionally essential: the body produces it in sufficient amounts on a daily basis, but its needs can exceed its production during significant stress, such as illness, injury, or intense and prolonged training.
The rest of the range
Amino acids also come in:
All amino acids are gathered on the amino acids page.
Its functions
Glutamine serves as fuel for the cells of the immune system and the intestinal wall, and helps transport nitrogen between tissues. During very heavy training periods, its blood concentration can drop, which has led to the hypothesis of a link with fatigue and sensitivity to infections in endurance athletes.
What studies say
Let’s be honest: in healthy athletes who consume enough proteins, studies don’t show a clear effect of glutamine on strength, muscle mass, or performance. Its relevance is mainly discussed during extreme training load periods or for digestive comfort. The indicated dose should be respected, usually a few grams per day, and a diet rich in proteins should be prioritised.
Good deals
Good deals can also be found in good plans, promotions, clearance, sales, Black Friday. The new arrivals showcase the latest collections, and items shipped in 24h are prepared and sent within 24 hours. The key events of the year follow a stable order: Black Friday at the end of autumn, year-end holidays, winter sales, spring French Days, then summer sales and back to school.
Frequently asked questions
Does L-glutamine really improve recovery?
Studies show little effect on strength or muscle mass in well-nourished athletes. Some suggest a reduction in muscle soreness, but evidence remains limited: glutamine is not a priority supplement.
When should you take L-glutamine?
It is usually taken after training or in the evening, mixed in water or a drink. During periods of very intense load, some athletes spread the dose throughout the day.
Should you take glutamine without exercising?
In a healthy sedentary person, the body produces enough glutamine. Supplementation is only beneficial in specific situations, such as recovery, and always with medical advice.
What role does glutamine play in the body?
It helps maintain muscle, nourishes the cells of the intestine, and serves as fuel for the cells of the immune system. Its needs increase during significant stress, such as illness, injury, or prolonged training.
Can glutamine be combined with whey?
Yes, it mixes easily in a protein shaker after exercise. However, whey already naturally contains it, which reduces the need for an additional boost for most users.
