Nag
Also known as: N-Acetyl-L-glutamine, N-acetyl glutamine, NAG, Acetylated glutamine, N-Acetyl L-Glutamine
Overview
N-Acetyl L-Glutamine is a modified form of the amino acid L-Glutamine that plays essential roles in various physiological functions. It is naturally found in protein-rich foods such as meat, fish, eggs, and dairy. Therapeutically, it is particularly utilized in clinical settings, especially beneficial for those recovering from critical illnesses, severe burns, and cancer treatments. This compound serves as an important energy source for intestinal and immune cells, significantly supporting muscle recovery, gut health, and immune function. Its efficacy is supported by numerous studies, including randomized controlled trials and systematic reviews, which highlight its value in therapeutic diets aimed at enhancing recovery.
Benefits
N-Acetyl L-Glutamine provides various clinical benefits, particularly for patients experiencing radiation-induced oral mucositis during head and neck cancer therapies. Evidence indicates that it can improve outcomes in burn victims by decreasing hospital stays and promoting effective wound healing. The strength of evidence varies; systematic reviews offer robust findings, while some studies on burn care show mixed results. The most significant effects include faster recovery rates and enhanced immune responses in patients receiving advanced medical care. Collectively, these findings support its application in supportive care and recovery strategies.
How it works
N-Acetyl L-Glutamine serves as a key energy substrate for enterocytes and immune cells, vital for sustaining gut mucosal integrity and overall function. It facilitates nitrogen transportation and metabolism, assisting in the synthesis of glutathione, a crucial antioxidant. Additionally, it helps maintain the structural integrity of the gut, promoting a healthy intestinal barrier and lowering gastrointestinal permeability, which can contribute to reduced inflammation.
Side effects
N-Acetyl L-Glutamine is generally recognized as safe for short-term use. Mild gastrointestinal side effects can occur in over 5% of users, including nausea, diarrhea, and abdominal discomfort. Less common effects, which occur in 1-5% of individuals, include headaches and dizziness. Rare allergic reactions affect less than 1% of users. Individuals with severe liver or kidney issues should take caution. Although limited drug interactions have been documented, it is advisable for individuals to consult a healthcare provider before starting supplementation, particularly those on medications impacting immune or gastrointestinal health.
Dosage
The recommended dosage of N-Acetyl L-Glutamine typically ranges from 5 to 20 grams daily, varying based on individual health conditions and recovery goals. For alleviating radiation-induced mucositis symptoms, doses of 10 to 15 grams daily have proven effective. While no officially designated maximum dose exists, daily intakes exceeding 20 grams are not advisable due to a lack of safety data. For optimal absorption, it is best to consume N-Acetyl L-Glutamine on an empty stomach or before bedtime. It is available in various forms, including powders, capsules, and tablets, with powdered forms being favored for their dosing flexibility.
FAQs
Is L-Glutamine safe?
L-Glutamine is generally considered safe for most individuals, though mild gastrointestinal side effects can occur.
When is the best time to take L-Glutamine?
It's recommended to take L-Glutamine on an empty stomach or before bedtime for optimal absorption.
What results can I expect from L-Glutamine supplementation?
Benefits can vary, but significant improvements have been noted in reducing radiation-induced mucositis and promoting wound healing.
Are there common misconceptions about L-Glutamine?
Some think it’s a universal cure; however, its benefits are context-specific and best in certain medical conditions.
Supplements Containing Nag
Recommended Articles

2025's Top Vegan Protein Powders: A Buyer's Guide
In 2025, the best vegan protein powders are third-party tested, ensuring purity, safety, and high nutritional content.

Top Ingredients for Healthy Weight Management
Dietary fiber, protein, omega-3 fatty acids, and water are crucial for managing a healthy weight.

Top Anti-Inflammatory Supplement Ingredients
Curcumin, omega-3 fatty acids, CBD, and Vitamin D are proven to effectively reduce chronic inflammation.

L-Theanine Dosage for Focus: Avoid Drowsiness
200-400mg daily of L-theanine enhances focus without causing drowsiness, with benefits amplified when combined with caffeine.