Glutamine: essential amino acid for your well-being
Publié le 21-04-2023 et mis à jour le 08-08-2025
Everything to know about this non-essential amino acid, also known as L-glutamine!
Summary
I. Origin of glutamine II. Glutamine benefits 1. Repair muscles subjected to effort 2. Improve sports performance 3. Maintain the integrity of the intestinal barrier 4. Before sleeping 5. Benefits for the skin 6. Immune system support III. Where to find glutamine? IV. Glutamine deficiencies V. Our solutions for the microbiota and bloating
I. Origin of glutamine
This amino acid, also identified as L-Glutamine, is a free amino acid, which means it does not combine with others to form a protein. It is widely present in our body, notably in our blood and muscles where it is the most abundant amino acid. Its role is essential in protein synthesis and the inhibition of their degradation process.
The production of glutamine in our body mainly comes from the foods we consume daily. Raw vegetables, legumes, dairy products, and plant and animal proteins are among these. The latter are rich in nitrogen, a key element in the synthesis of this amino acid.
Glutamine is not an essential amino acid, meaning it can be synthesized by the body. However, it can become temporarily indispensable in certain contexts. This is the case during stressful events such as intense physical training, serious illness, or traumatic stress (surgery, accident…). In these situations, its concentration can drastically drop in our body (up to 50%). A normal diet will then no longer be sufficient to compensate for this decrease. In such cases, it is recommended to supplement with this amino acid to prevent any undesirable deficiency.
It should be noted that this element is also produced in certain parts of our body, notably in the muscles and lungs. That is why it is so present in our muscles. Furthermore, it plays an important role in the functioning of our immune system and our intestinal health.
The organic variant, often referred to as Pure L-Glutamine, is obtained from natural sources and without chemical additives. It stands out for its purity and effectiveness. At D-LAB NUTRICOSMETICS, the focus is on the quality and naturalness of the ingredients, thus ensuring optimal bioavailability. Moreover, our Pure L comes from vegetable fermentation, which ensures a maximum concentration of essential nutrients. By respecting the principles of organic farming, we promote sustainable and environmentally friendly production. Our manufacturing process also guarantees the absence of potentially harmful chemical residues, making our product perfectly safe for regular consumption.
II. Glutamine benefits
Athletes are not the only ones concerned with glutamine; its positive effects on the immune system and intestinal wall make it an ally for everyone!
1. Repair muscles subjected to effort
Glutamine allows better physical recovery, especially during high-intensity training, such as bodybuilding. Muscles are composed of 60% of this substance, and over time intense physical efforts can lead to muscle tissue degradation and thus the amino acids present.
The recovery phase is important for athletes, and this amino acid is involved in this process. Indeed, it improves the replenishment of muscle glycogen stores and thus damaged tissues during physical effort.
Moreover, research shows that amino acids like glutamine can help speed up recovery after intense exercise by reducing muscle pain and improving muscle function.
2. Improve sports performance
In bodybuilding
Dietary supplements containing this substance help prevent and fight against overtraining syndrome. This syndrome significantly weakens the athlete's immune defenses by reducing their reserves, which can cause various infections. Moreover, it plays an essential role in protein synthesis, a crucial function for muscle growth and repair.
In sports
Outside of bodybuilding, glutamine is also beneficial for other types of sports. It helps maintain endurance and reduce fatigue, allowing athletes to extend their training sessions and improve their overall performance.
This element can also help reduce recovery time between training sessions, which can help increase training session productivity.
3. Maintain the integrity of the intestinal barrier
Glutamine plays a role in maintaining the intestinal barrier, which is necessary for good digestion.
Intestinal cells feed on this substance to develop. If they lack this energy source, the intestinal barrier becomes “leaky” and the intestine “permeable” because it does not filter digestion residues efficiently enough and allows toxic substances to enter the bloodstream.
Moreover, it can help maintain the balance of the intestinal flora, which can contribute to good digestive health.
4. Before sleeping
Glutamine has calming effects on stress, promotes serenity, and facilitates rest.
Taking glutamine before sleeping can help improve sleep quality and reduce sleep disorders.
Indeed, it is a precursor of GABA, a neurotransmitter that helps reduce neuronal excitability and promote relaxation and sleep.
5. Benefits for the skin
It also contributes to skin health. It helps maintain hydration, promotes healing, and can reduce signs of aging by supporting collagen production.
Moreover, it acts as fuel for skin cells, aiding in cell regeneration and skin tissue repair.
It can also help reduce inflammation and oxidative stress, which are two major factors in premature skin aging.
6. Immune system support
This amino acid plays a crucial role in the functioning of the immune system.
As the main fuel for immune cells, it helps strengthen the immune system and fight infections and diseases. Glutamine supplementation can therefore help maintain a strong and resilient immune system.
III. Where to find glutamine?
This amino acid valuable for our body, glutamine, is mainly found in animal and plant proteins.
Animal sources notably include chicken and fish, while plant sources include tofu, peas, lentils, and beans.
Other foods such as spinach, beets, cabbage, and cereals are also sources of this substance.
As a dietary supplement, it is often presented in the form of tablets or powder. These formats offer a convenient way to integrate this amino acid into your daily routine, whether by adding it to your meals or drinks.
At D-LAB NUTRICOSMETICS, we offer the Pro-Collagène Digestion treatment, based on several elements including L-Glutamine, marine collagen, chicory, papain, and a set of prebiotics and probiotics.
This supplement is an ideal solution to incorporate this amino acid into your diet while benefiting from other ingredients that support your well-being.
1. In powder
Its powder form is a popular supplementation option. It is easy to dose and can be added to drinks or smoothies for convenient consumption. This form is especially preferred by those who want precise control over their intake of this amino acid.
2. In the daily diet
Incorporating this substance into your daily diet is also a viable option. In addition to the sources mentioned previously, other foods such as dairy products and certain vegetables can also increase your intake of this amino acid.
What is the food richest in this amino acid?
Among foods, chicken is one of the richest in glutamine. It is closely followed by fish, dairy products, and certain legumes such as peas and lentils. It is therefore recommended to include these foods in your diet to ensure sufficient intake of this amino acid.
IV. Glutamine deficiencies
Glutamine is the most notable fuel for intestinal and immune cells.
A deficiency in this substance is often linked to sleep disorders, restlessness, and difficulty concentrating. It has calming effects on stress, encourages serenity, and facilitates rest.
Moreover, a lack of this amino acid can cause a decrease in immune function, poor post-exercise recovery, and an increased susceptibility to infections.
For these reasons, it is crucial to ensure an adequate intake, either through a balanced diet or through dietary supplements containing glutamine.
V. Our solutions for the microbiota and bloating
Bloating is caused by an imbalance of the microbiota (also called intestinal flora).
At D-LAB NUTRICOSMETICS, we offer a range of dietary supplements for the belly and the microbiota.
We also recommend alongside Pro-Collagen Digestion:
- The Flat Belly Program.
A program focused on the belly, our second brain. Composed of 29 active ingredients, it will rebalance the digestive system to sustainably reduce waist circumference and regulate hormonal balance and stress to trigger weight loss while avoiding fat storage.
Thus, vitamin B6 helps regulate hormonal and nervous activity, chromium and guarana support the metabolism of sugars and fats, and fucus rich in mucilages contributes to the balance of the digestive system for a lasting result on waist circumference.
- The Absolu Probiopure
Absolu which is an association of 5 strains of lactic ferments, the closest to the human intestinal microbiota, and are highly concentrated and encapsulated in a gastro-resistant capsule, to guarantee maximum assimilation and harmonious development within the intestinal flora itself.
