L-Glutamine is an amino acid crucial for gut health, immune function, and muscle recovery. With numerous options available, selecting the right supplement can be challenging. This guide will help you navigate the key factors to consider for an effective and high-quality L-Glutamine supplement.
Looking for the best L-Glutamine Nutritional Supplements?
Discover now our comparison of the best L-Glutamine Nutritional Supplements. It is never easy to choose from the wide range of offers. On the market, you will find an incalculable number of models, all at different prices. And as you will discover, the best L-Glutamine Nutritional Supplements are not always the ones at the highest prices! Many criteria are used, and they make the richness and relevance of this comparison.
To help you make the best choice among the hundreds of products available, we have decided to offer you a comparison of the L-Glutamine Nutritional Supplements in order to find the best quality/price ratio. In this ranking, you will find products listed according to their price, but also their characteristics and the opinions of other customers. Also discover our comparisons by categories. You won’t have to choose your products at random anymore.
SaleNo. 1
NOW Foods Supplements, L-Glutamine 500 mg, Nitrogen Transporter*, Amino Acid, 120 Veg Capsules
- AMINO ACID/SUPPORTS IMMUNE FUNCTION*: Glutamine is considered to be a conditionally essential amino acid, which means that under certain circumstances, the body may require more glutamine than it can produce. In that case, supplementing with glutamine may...
- Product Note: Exposure to heat or sunlight may lead to melting/damage of product. Hence customers are expected to be available during the product delivery
- NITROGEN TRANSPORTER: In the body, glutamine functions as a major nitrogen transporter and is critical for the maintenance of healthy nitrogen balance.*
- CLASSIFICATIONS/CERTIFICATIONS: Halal, Non-GMO, Kosher, Dairy Free, Egg Free, Made without Gluten, Nut Free, Soy Free, Vegan/Vegetarian
- GMP Quality Assured: NOW closely adheres to both mandatory U.S. FDA Current Good Manufacturing Practices (CGMP) regulations and voluntary Natural Products Association (NPA) Good Manufacturing Practices (GMP) regulations. Good manufacturing practices...
- Packaged in the USA by a family owned and operated company since 1968
−42%
$9.30
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No. 2
Nutricost L-Glutamine Powder (500 Grams) Unflavored - Gluten Free & Non-GMO, 100 Servings
- 5000mg of L-Glutamine Powder Per Serving (100 Servings)
- 1.1 Pounds (500G) of L-Glutamine Powder Per Bottle
- Vegetarian Friendly L-Glutamine Powder
- Non-GMO, Gluten Free, Soy Free
- Manufactured In a NSF Certified, GMP Compliant, FDA Registered Facility
No. 3
Nutricost L-Glutamine 800mg, 180 Capsules - Gluten Free, Non-GMO
- L-Glutamine Dietary Supplement
- 800mg of L-Glutamine per Capsule
- 180 Servings of L-Glutamine Powder Per Bottle
- Non-GMO Gluten Free
- Manufactured in an NSF Certified, GMP Compliant, FDA Registered Facility
SaleNo. 4
Horbaach L Glutamine Capsules 1000mg | 180 Powder Pills | Supplement for Women and Men | Pre Workout & Post...
- L-GLUTAMINE: Convenient form of Glutamine, the most abundant amino acid in the human body
- ADVANCED FORMULA: Provides 1,000 mg of L-Glutamine per serving in convenient quick release capsules
- EXPERTLY CRAFTED: Our professional formula is backed by our commitment to purity and potency
- HORBAACH MANUFACTURERS: Laboratory Tested, Trusted Ingredients, Superior Quality, 100% Guaranteed!
- NATURALLY FREE OF: Gluten, Wheat, Milk, Lactose, Artificial Flavor, Preservatives & Non-GMO
SaleNo. 5
Nutricost L-Glutamine Powder 250 Grams
- 250 Grams of L-Glutamine Per Bottle
- 50 Servings of L-Glutamine Per Bottle
- 5 Grams of L-Glutamine Per Serving (Scoop Included)
- Vegan, Non-GMO, Gluten Free, Unflavored (No Flavoring Added - Natural)
- Manufactured In a NSF Certified, GMP Compliant, FDA Registered Facility
No. 6
Nutricost L-Glutamine Powder 1 KG - Unflavored, Non-GMO, Gluten Free
- Quality Assurance: 3rd Party Tested, Non-GMO, and Gluten Free
- Product Size: Contains 1 kilogram (2.2 pounds) of pure L-Glutamine powder
- Manufacturing Standards: Produced in a NSF-Certified, GMP-compliant and FDA-registered facility in the USA
- Clean Formula: Simple and pure ingredients without artificial fillers or additives
- Dietary Compatibility: Suitable for vegan diets and free from gluten
No. 7
Pure Encapsulations L-Glutamine 500 mg - Supplement for Immune and Digestive Support, Gut Health and Lining...
- Gastrointestinal Health: L-glutamine powder nutritionally supports the mucosal lining and healthy functioning of the gastrointestinal tract*
- Supports Lean Muscle: This L-glutamine supplement also helps support and preserve lean muscle mass, especially in times of metabolic stress*
- Amino Acid: L-glutamine is the most abundant amino acid in the body; glutamine is utilized by the body for tissue repair and gastrointestinal tract support*
- Pure Quality: Our supplements are made with premium ingredients sourced from trusted suppliers and guided by nutritional experts, then carefully manufactured and tested to verify potency and purity
- Pure Difference: What we leave out matters, too; Pure Encapsulations products are free from common allergens, artificial or unnecessary ingredients, and GMOs
No. 8
Sports Research L-Glutamine - Workout Recovery, Immune Health & Gut Health Support - 5 G Per Serving...
- L-GLUTAMINE POWERED BY SPORTS RESEARCH : Amino Acids are crucial in the process of building protein within the body. L-Glutamine is one of the most abundant amino acids in the human body—having enough of it aids in your body’s protein synthesis*
- WORKOUT RECOVERY, GUT & IMMUNE HEALTH: 1-2 daily scoops of pure L-Glutamine mixed into your favorite beverage, provides you with gut, immune and workout recovery support*
- ONE DAILY SCOOP: One to two daily scoops of our fermented glutamine powder, mixed into your favorite beverage, provide you with a range of benefits you can see and feel—especially when combined with a regular workout routine*
- DEDICATED TO QUALITY: Our L-Glutamine is made using a proprietary fermentation process, and a high-quality powder from a premium, trusted name made in the USA— entirely vegan, Informed Sport tested for banned substances, gluten-free and non-GMO tested
- THE SPORTS RESEARCH DIFFERENCE: Founded in Southern California in 1980, Sports Research is a family-owned business born from a passion for fitness and wellness. Our goal is to embrace the sport of life through research-backed products created for every...
SaleNo. 9
Optimum Nutrition L-Glutamine Muscle Recovery Capsules, 1000mg, 240 Count (Package May Vary)
- 1000 milligram of pure l glutamine per 2 capsules
- Product Note: Exposure to heat or sunlight may lead to melting/damage of product. Hence customers are expected to be available during the product delivery
- Most abundant amino acid in the body
- Plays an important role in muscle protein development
- During prolonged periods of intense exercise, glutamine levels may be depleted
−13%
$20.99
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No. 10
Now L-Glutamine 500mg 300 Veg Capsules - Non-GMO Supplement - Vegan Lglutamine Caps
- FREE FORM L-GLUTAMINE: NOW Brand's premium L-Glutamine 500 mg amino acid supplement.
- EASY TO TAKE ON THE GO: No need to mix any powder. Easy to take these capsules when at the gym or at work or over lunch. BENEFITS FOR MEN AND WOMEN: Glutamin supports immune function* & nitrogen transporter*. Benefits gut health*.
- BETTER FOR YOU: Non-GMO, Vegetarian, Vegan.
- GOING GREEN: We are planting 1 tree for every 20 bottles sold of this 300-count product, up to 5,000 trees per year. Help us make the world a greener place.
- TRUSTED QUALITY FOR OVER 50 YEARS: Family owned since 1968. Based in the heart of America on solid Midwestern values.
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Last update on 2026-03-21 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best L-Glutamine Nutritional Supplements
What is L-Glutamine?
L-Glutamine is the most abundant amino acid in the body, playing a vital role in protein synthesis, immune cell function, and maintaining the integrity of the intestinal lining. It's considered a conditionally essential amino acid, meaning the body may need more of it during times of stress or illness.
Benefits of L-Glutamine Supplements
- Gut Health: Supports the intestinal lining, aiding in the repair of damaged gut tissue and potentially alleviating symptoms of digestive disorders.
- Immune Support: Provides fuel for immune cells, helping to bolster the body's defense system, especially during periods of physical stress.
- Muscle Recovery: May aid in reducing muscle soreness and improving recovery after strenuous exercise by replenishing muscle glutamine stores.
- Nutrient Absorption: A healthy gut lining is essential for efficient nutrient absorption.
Key Factors to Consider
- Purity: Look for supplements that are 100% pure L-Glutamine with minimal additives or fillers. Certifications like NSF Certified for Sport or USP ensure third-party testing for purity and potency.
- Form: L-Glutamine is typically available in powder or capsule form. Powders offer flexibility in dosage and can be mixed into beverages, while capsules provide convenience.
- Source: While most L-Glutamine is synthetically produced or derived from animal sources, vegetarian or vegan sources are also available.
- Dosage: Typical daily dosages range from 5 to 15 grams, often split throughout the day. Consult with a healthcare professional for personalized recommendations.
Comparison Tips
- Read Labels Carefully: Pay attention to the serving size, ingredient list, and any third-party certifications.
- Check for Allergens: Ensure the product is free from common allergens if you have sensitivities.
- Consider Your Goals: If your primary focus is gut health, look for products with transparent sourcing and purity standards. For athletic performance, certifications related to sports may be beneficial.
Frequently Asked Questions
Who might benefit from taking L-Glutamine?
Individuals experiencing digestive issues, those recovering from illness or surgery, athletes looking to support muscle recovery, or people undergoing significant physical stress may find L-Glutamine beneficial. However, it's always best to consult a healthcare provider.
Is L-Glutamine safe for everyone?
For most healthy adults, L-Glutamine is generally safe when taken as directed. However, individuals with certain medical conditions, such as kidney or liver disease, should consult their doctor before use.
What is the best time to take L-Glutamine?
The optimal timing can vary depending on individual goals. Some prefer taking it on an empty stomach, especially in the morning or before bed, while athletes might take it post-workout to aid recovery. Splitting doses throughout the day is also common.
How long does it take to see results from L-Glutamine?
The timeframe for experiencing benefits can differ significantly from person to person. Some may notice improvements in digestive comfort or recovery within a few weeks, while others might require longer use to observe noticeable effects.
Can L-Glutamine interact with medications?
While generally considered safe, L-Glutamine could potentially interact with certain medications. It's advisable to discuss your supplement regimen with your doctor or pharmacist to avoid any adverse interactions.
What's the difference between L-Glutamine and glutamine peptides?
L-Glutamine is the free-form amino acid, while glutamine peptides are chains of amino acids including glutamine. Some believe peptides are more stable and better absorbed, though research is ongoing. Both aim to provide glutamine to the body.