L-Glutamine is an amino acid, often referred to as a building block of proteins, which is naturally found in high concentrations in the body, particularly in the muscles. It plays a crucial role in various bodily functions, including immune system support and intestinal health. The most studied health effects of L-Glutamine include its potential to support muscle recovery after exercise, enhance immune function, and improve gut health by maintaining the integrity of the intestinal lining. Clinic

How many studies on L-Glutamine are available?

NutriVouch references 94 human studies on L-Glutamine, all peer-reviewed and indexed on PubMed.

Is L-Glutamine effective for Immune Support?

For Immune Support, L-Glutamine has an effectiveness score of 4/10 — weak or limited clinical evidence. Based on 31 relevant studies.

Is L-Glutamine effective for Muscle Growth?

For Muscle Growth, L-Glutamine has an effectiveness score of 3/10 — weak or limited clinical evidence. Based on 9 relevant studies.

Is L-Glutamine effective for Anti-Inflammation?

For Anti-Inflammation, L-Glutamine has an effectiveness score of 3/10 — weak or limited clinical evidence. Based on 10 relevant studies.

Is L-Glutamine effective for Antioxidant Protection?

For Antioxidant Protection, L-Glutamine has an effectiveness score of 2/10 — minimal evidence — marketed but thinly supported. Based on 17 relevant studies.

Is L-Glutamine effective for Heart Health?

For Heart Health, L-Glutamine has an effectiveness score of 1/10 — minimal evidence — marketed but thinly supported. Based on 11 relevant studies.

Confidence level

Moderate evidence

94 studies

L-Glutamine

How to take L-Glutamine

✦Can be taken with or without food. No significant absorption interactions known.

L-Glutamine dosage

⚖

Common dose: 5–15 grams daily

RDA: No official RDA established

Upper limit: Not established

Best form: L-glutamine powder

Timing: Preferably on an empty stomach or as directed by a healthcare provider.

Supplementation may support gut health and recovery in physically active individuals. Consult a healthcare provider for long-term use or if you have health conditions.

What L-Glutamine is used for

🍇 Antioxidant Protection

2.017 studies›

❤ Heart Health

1.011 studies›

Food Sources

Beef1.2g per 100g
Eggs0.6g per 100g
Tofu0.6g per 100g
Milk0.3g per cup
White rice0.3g per 100g