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Top 13 Best Glutamine Supplements

Written by Andrew Le, MD

UpdatedFebruary 22, 2024

Glutamine is one of the most abundant amino acids in the human body and plays a crucial role in protein synthesis, immune system function, and intestinal health. As a result, glutamine supplements have become increasingly popular among athletes, bodybuilders, and people with digestive issues.

When it comes to glutamine supplements, there are several forms available, including L-glutamine, glutamine peptides, and N-acetyl glutamine. Each form has its unique benefits and drawbacks, making it essential to choose the right one for your needs.

One critical factor to consider when selecting a glutamine supplement is the purity of the product. Some supplements may contain fillers or other ingredients that can dilute the effectiveness of the glutamine. Additionally, the dosage and frequency of the supplement may vary depending on your goals and health status.

After researching and testing various glutamine supplements, we have identified the best glutamine supplement for maximizing muscle growth and recovery, improving gut health, and boosting immune system function. First on our list is Optimum Nutrition Glutamine 1000mg, 120 Capsules, which can help support muscle recovery and development. Second on the list is NOW Supplements, L-Glutamine 500 mg. It is a great option that can help support your immune function and nitrogen balance. Evlution Glutamine5000, is the third glutamine supplement on our list. It offers 5 grams of pure plant-based nitric oxide powder to support your goals.

Best Glutamine Supplements

If you're looking to enhance your workout performance and recovery, glutamine supplements may be worth considering. Glutamine is an amino acid that plays a key role in muscle growth, repair, and immune function. While your body naturally produces glutamine, supplementing with it can help support your fitness goals and overall health. In this roundup, we've compiled a list of the best glutamine supplements on the market based on factors such as quality, potency, and customer reviews.

Optimum Nutrition Glutamine 1000mg, 120 Capsules

The Editor's Choice

Optimum Nutrition Glutamine 1000mg, 120 Capsules fuels muscle recovery and growth. Packed with 1000mg of pure l glutamine per 2 capsules, it's a potent choice. Unleash the power of your body's most abundant amino acid for muscle protein development. Ideal for intense workouts, it's your go-to solution. Just guard it from heat and light.

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If you're looking for a reliable glutamine supplement, Optimum Nutrition Glutamine 1000mg, 120 Capsules is a great option to consider.

If you're looking for a glutamine supplement that can help support muscle recovery and development, Optimum Nutrition Glutamine 1000mg, 120 Capsules is definitely worth considering. With 1000mg of pure l glutamine per 2 capsules, it's a potent and effective option.

One of the biggest advantages of Optimum Nutrition Glutamine 1000mg, 120 Capsules is that it contains the most abundant amino acid in the body. This amino acid plays an important role in muscle protein development, making it an essential component of any muscle-building regimen.

In addition to supporting muscle development, Optimum Nutrition Glutamine 1000mg, 120 Capsules can also help support muscle recovery. This is especially important for those who engage in prolonged periods of intense exercise, as glutamine levels may become depleted over time.

While Optimum Nutrition Glutamine 1000mg, 120 Capsules is a great option for most people, it's important to note that exposure to heat or sunlight may lead to melting or damage of the product. Additionally, some customers may prefer a flavored option, and those with certain dietary restrictions may need to consider other options.

Pros

  • Contains 1000mg of pure l glutamine per 2 capsules
  • Most abundant amino acid in the body and plays an important role in muscle protein development
  • Helps support muscle recovery

Cons

  • Exposure to heat or sunlight may lead to melting/damage of product
  • Some customers may prefer a flavored option
  • May not be suitable for those with certain dietary restrictions
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If you are looking for a glutamine supplement, NOW Supplements, L-Glutamine 500 mg is a great option that can help support your immune function and nitrogen balance.

I have been using NOW Supplements, L-Glutamine 500 mg for a few weeks now and have noticed that it has helped me recover faster after my workouts. I also feel like my immune system is stronger and more resilient. The capsules are easy to swallow, and I appreciate that they are vegan and free from gluten, dairy, egg, and soy.

One thing to keep in mind is that the product may melt or get damaged if exposed to heat or sunlight, so it's important to be available during the product delivery. Some customers may also find the capsules too large to swallow, so this may not be the best option for everyone. However, overall, I think that NOW Supplements, L-Glutamine 500 mg is a great product that can benefit anyone looking to support their immune function and nitrogen balance.

Pros

  • Helps with recovery of the amino acid in the body
  • Functions as a major nitrogen transporter
  • Supports immune function

Cons

  • Product may melt or get damaged if exposed to heat or sunlight
  • Some customers may find the capsules too large to swallow
  • May not work for everyone
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If you're looking for a high-quality glutamine supplement, Evlution Glutamine5000 is definitely worth considering.

This supplement is ideal for anyone looking to jumpstart their recovery after a workout. It offers 5 grams of pure plant-based nitric oxide powder to support your goals. Additionally, it helps with faster muscle recovery thanks to the amino acid's role in muscle synthesis. Made in the USA at a cGMP facility, you can be sure you're getting the very best after-workout muscle recovery amino acid nutritional supplement.

If you're looking for a high-quality glutamine supplement that delivers results, Evlution Glutamine5000 is definitely worth considering. It's pure, transparent, and made with only the finest lab-tested premium quality ingredients. So why wait? Get started on your journey to better health and fitness today with Evlution Glutamine5000!

Pros

  • Contains 5 grams of pure plant-based nitric oxide powder to support your goals
  • Helps with faster muscle recovery thanks to the amino acid's role in muscle synthesis
  • Made in the USA at a cGMP facility to ensure quality

Cons

  • May thicken whatever drink you put it in
  • Some users may not like the unflavored taste
  • May not work for everyone
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If you're looking for a high-quality glutamine supplement, Nutricost L-Glutamine Powder is definitely worth considering.

Nutricost L-Glutamine Powder is a great option for anyone looking to support their digestive health, immune system, weight management, and brain health. The powder is easy to mix into your favorite beverage or smoothie, and it's free from gluten, soy, and GMOs.

One of the standout features of this supplement is the high concentration of L-Glutamine Powder per serving. With 5000mg of L-Glutamine Powder per serving, you can be sure that you're getting a potent dose of this essential amino acid.

Another great thing about Nutricost L-Glutamine Powder is that it's manufactured in a GMP compliant, FDA registered facility. This means that you can trust that the product is made to the highest standards of quality and safety.

While the unflavored powder may not be the most appealing taste-wise, it's still a great option for anyone who wants to avoid artificial flavors and sweeteners. However, some users have reported that the powder doesn't dissolve easily, which can be frustrating.

Finally, while the packaging is relatively simple and straightforward, it may not be the most durable. Some users have reported that the lid can be difficult to open or close, and that the powder can spill easily if the container is knocked over.

Overall, if you're looking for a high-quality glutamine supplement that's vegetarian-friendly, gluten-free, and manufactured to the highest standards of quality and safety, Nutricost L-Glutamine Powder is definitely worth considering.

Pros

  • Contains 5000mg of L-Glutamine Powder per serving
  • Manufactured in a GMP compliant, FDA registered facility
  • Vegetarian-friendly and gluten-free

Cons

  • The unflavored powder may not taste great to some people
  • Some users have reported that the powder doesn't dissolve easily
  • The packaging may not be the most durable
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If you're looking for a high-quality glutamine supplement, the Life Extension Glutamine Supplement is definitely worth considering.

This glutamine supplement is designed to support healthy muscle mass, maintain optimal immune function and gut health, and help maintain energy levels under heavy stress. It's made with high-quality, free-form L-glutamine and is gluten-free and non-GMO.

One of the standout features of this supplement is its antioxidant support, which helps maintain muscle health and supports the body's natural defenses against oxidative stress. Additionally, the Life Extension brand is known for using only the finest raw ingredients and adhering to strict quality standards.

While this supplement may not be suitable for everyone, it's a great option for anyone looking to support their active lifestyle with a high-quality glutamine supplement.

Pros

  • Supports muscle health and immune function
  • Helps maintain energy levels under heavy stress
  • Gluten-free and non-GMO

Cons

  • May not be suitable for those with certain medical conditions
  • Some users may experience side effects such as stomach upset or headaches
  • Capsules may be difficult to swallow for some individuals
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If you're looking for a natural way to support your overall health and wellbeing, REVIVE Gut L-Glutamine Powder MD is a great choice. With its potent dose of L-Glutamine, this supplement can help support muscle recovery, reduce muscle soreness, improve immune function, and promote healthy gut function.

REVIVE Gut L-Glutamine Powder MD is a natural supplement designed to support muscle recovery, immune function, and gut health. This formula contains a potent dose of L-Glutamine, an essential amino acid that plays a critical role in the body's recovery and repair processes. With its pure L-Glutamine content, this supplement can help reduce muscle soreness, improve immune function, and promote healthy gut function.

One of the best things about REVIVE Gut L-Glutamine Powder MD is that it's vegan-friendly, gluten-free, and soy-free. This makes it a great choice for anyone looking for a natural way to support their overall health and wellbeing. Plus, with its easy-to-mix formula, you can easily incorporate it into your daily routine.

Another great thing about this supplement is that it's made with effective ingredients and no artificial fillers or dyes. This means you're getting everything you need and nothing you don't. REVIVE MD's mission is to encourage, educate, and empower you to harness the powers of nature to better your health.

Overall, if you're looking for a natural way to support your overall health and wellbeing, REVIVE Gut L-Glutamine Powder MD is a great choice. With its pure L-Glutamine content, vegan-friendly and gluten-free formula, and support for muscle recovery, immune function, and gut health, this supplement is definitely worth considering.

Pros

  • Pure L-Glutamine for maximum effectiveness
  • Vegan-friendly, gluten-free, and soy-free
  • Supports muscle recovery, immune function, and gut health

Cons

  • Some users may not like the taste
  • May not be suitable for those with certain medical conditions
  • May take some time to see results
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If you're looking for a high-quality glutamine supplement, Thorne L-Glutamine is definitely worth considering.

Thorne L-Glutamine is a great choice for those looking to improve their gut health and immune function. Its amino acid formula helps with post-exercise muscle cell repair, and it's also great for maintaining gut permeability and optimal gut barrier function. Additionally, it helps restore plasma glutamine levels depleted after periods of physical stress, such as prolonged exhaustive exercise.

One of the biggest selling points of Thorne L-Glutamine is its reputation. It's trusted by over 100 pro teams, and Thorne is the only supplement manufacturer to collaborate with Mayo Clinic on wellness research and content. Thorne is also a proud partner of U.S. Olympic Teams.

However, it's worth noting that Thorne L-Glutamine may not be the best choice for everyone. Some users may find the capsules difficult to swallow, and others may not see immediate results. Additionally, it's relatively expensive compared to other glutamine supplements on the market.

Overall, Thorne L-Glutamine is a high-quality supplement that's definitely worth considering if you're looking to improve your gut health and immune function.

Pros

  • Promotes gastrointestinal and immune system health
  • Helps restore plasma glutamine levels depleted after periods of physical stress
  • Trusted by 100+ pro teams and a proud partner of U.S. Olympic Teams

Cons

  • Capsules may be difficult to swallow for some people
  • Some users may not see immediate results
  • Relatively expensive compared to other glutamine supplements
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If you're looking for a high-quality glutamine supplement, Naked Nutrition Pure L-Glutamine is a great option.

Naked Nutrition Pure L-Glutamine is a high-quality, pure supplement that can help with muscle growth, recovery, immune function, gut health, and more. The finely micronized powder is designed for optimal absorption, so you can be sure you're getting the most out of each scoop. While the supplement is unflavored, it dissolves quickly and easily and can be added to your favorite beverage or smoothie without affecting the taste. The large tub may be more than some users need, but the supplement is a great value for the price.

In addition to its benefits for muscle growth and recovery, glutamine is also known for its ability to help with stomach ulcers, leaky gut, IBS, metabolism, cellular detoxification, and more. Naked Nutrition Pure L-Glutamine is independently third-party tested for purity, safety, and nutritional value, so you can be sure you're getting a high-quality product. Overall, if you're looking for a pure and effective glutamine supplement, Naked Nutrition Pure L-Glutamine is a great choice.

Pros

  • Naked Nutrition Pure L-Glutamine is free of fillers, flavors, colors, and sweeteners, making it a pure and high-quality choice.
  • The finely micronized powder is designed for optimal absorption, so you can be sure you're getting the most out of each scoop.
  • Glutamine is an essential amino acid that can help with muscle growth, recovery, immune function, gut health, and more, so it's a great choice for post-workout supplementation.

Cons

  • Naked Nutrition Pure L-Glutamine is unflavored, which may not be appealing to those who prefer flavored supplements.
  • The tub is quite large at 35.2 ounces, which may be more than some users need.
  • While Naked Nutrition Pure L-Glutamine is vegan and non-GMO, it is not certified organic.
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If you're looking for a supplement that supports your immune and digestive system, muscle mass, and metabolism, Pure Encapsulations L-Glutamine Supplement is a great option.

Pure Encapsulations L-Glutamine Supplement is a high-quality product that is free from common allergens, artificial or unnecessary ingredients, and GMOs. It's formulated to provide optimal support for gastrointestinal health, lean muscle mass, and overall well-being.

If you're looking for a supplement that can help you maintain a healthy digestive system, Pure Encapsulations L-Glutamine Supplement is definitely worth considering. With its premium ingredients and careful manufacturing process, you can be sure that you're getting a high-quality product that will deliver the results you're looking for.

In addition to its many health benefits, Pure Encapsulations L-Glutamine Supplement is also hypoallergenic, making it a great choice for people with allergies or sensitivities to certain ingredients.

Overall, if you're looking for a high-quality glutamine supplement that can help you maintain optimal health and well-being, Pure Encapsulations L-Glutamine Supplement is definitely worth checking out.

Pros

  • Nutritionally supports the mucosal lining and healthy functioning of the gastrointestinal tract
  • Helps support and preserve lean muscle mass, especially in times of metabolic stress
  • Utilized by the body for tissue repair and gastrointestinal tract support

Cons

  • Some users have reported stomach discomfort
  • Capsules may be difficult to swallow for some people
  • May take some time to see results
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If you're looking for an affordable and effective glutamine supplement, BULKSUPPLEMENTS.COM L-Glutamine Powder is an excellent choice.

BULKSUPPLEMENTS.COM L-Glutamine Powder is a high-quality supplement that can help support muscle recovery and healthy digestion. It is gluten-free, soy-free, dairy-free, and contains no added sugar, making it perfect for those leading an active and healthy lifestyle. Additionally, this supplement is easy to mix with any beverage of your choosing or simply with water.

One of the standout features of this supplement is its ability to support muscle recovery. L-Glutamine is an important amino acid that may help your muscles recover faster and more efficiently. Adding this supplement to your daily routine, especially accompanied with BCAA supplements, can help you stay energized in your activities and throughout the day. Additionally, this glutamine supplement may help you train harder for longer periods of time.

Another benefit of this supplement is its ability to promote healthy gut flora. L-Glutamine plays an important role in maintaining a healthy gut flora, which is essential for overall health. This supplement is perfect for anyone looking to support their digestive system and improve nutrient absorption.

While this supplement has many benefits, some users may experience stomach discomfort. Additionally, some users may find the taste slightly bitter. Lastly, the packaging may be inconvenient for some users.

Overall, BULKSUPPLEMENTS.COM L-Glutamine Powder is an excellent choice for anyone looking for an affordable and effective glutamine supplement. It is high-quality, gluten-free, and easy to mix with any beverage of your choosing.

Pros

  • Supports muscle recovery
  • Promotes healthy gut
  • Gluten-free and no added sugar

Cons

  • Some users may experience stomach discomfort
  • May have a slightly bitter taste
  • Packaging may be inconvenient for some users
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If you're looking for a high-quality L-glutamine supplement, Pure Encapsulations L-Glutamine Powder is worth considering.

This supplement is designed to support the mucosal lining and healthy functioning of the gastrointestinal tract. It's also helpful in preserving lean muscle mass, especially during times of metabolic stress. Additionally, L-glutamine is the most abundant amino acid in the body and is utilized by the body for tissue repair and gastrointestinal tract support.

One of the standout features of this supplement is its quality. The ingredients are sourced from trusted suppliers and the product is carefully manufactured and tested to verify potency and purity. It's also free from common allergens, artificial or unnecessary ingredients, and GMOs.

However, one potential downside is that the powder is unflavored, which may not be appealing to everyone. Additionally, it's more expensive than some other brands on the market. Finally, some users have reported difficulty getting the powder to dissolve in cold liquids.

Overall, if you're looking for a high-quality L-glutamine supplement to support your gastrointestinal health and preserve lean muscle mass, Pure Encapsulations L-Glutamine Powder is definitely worth considering.

Pros

  • Supports gastrointestinal health
  • Helps preserve lean muscle mass
  • Made with premium ingredients

Cons

  • Unflavored
  • Expensive compared to other brands
  • May not dissolve easily in cold liquids
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If you're looking for a reliable glutamine supplement to help with muscle recovery and endurance, MuscleTech's 100% Glutamine Powder is a solid choice.

MuscleTech's Glutamine Powder is designed to quickly replenish the glutamine your muscles lose during intense training sessions. It's odorless, tasteless, and dissolves easily, making it easy to mix with other supplements. However, customers should be aware that exposure to heat or sunlight can damage the product, and the short scoop can make it difficult to access the powder. Some customers also experienced negative side effects after using the product.

Overall, if you're in need of a glutamine supplement and are willing to take precautions to protect the product, MuscleTech's Glutamine Powder is a solid choice for helping with muscle recovery and endurance.

Pros

  • Rapidly replenishes glutamine used during training
  • Odorless, tasteless, and dissolves easily
  • Can be stacked with other supplements

Cons

  • May melt or become damaged if exposed to heat or sunlight
  • Short scoop can make it difficult to access powder
  • Some customers experienced negative side effects
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If you're looking for a high-quality glutamine supplement, NOW Sports L-Glutamine Double Strength might be a good option for you.

NOW Sports L-Glutamine Double Strength is a high-quality supplement that has been comprehensively tested for purity and effectiveness. With 1,000 mg of glutamine per capsule, it is double the strength of many other glutamine supplements on the market. This supplement is critical for nitrogen balance and immune system health, making it a great choice for athletes and active individuals.

One potential downside of this supplement is that it may melt or become damaged if exposed to heat or sunlight, so it's important to store it in a cool, dry place. Additionally, some users may find the large capsules difficult to swallow, and others may not notice any effects from taking the supplement.

Overall, if you're looking for a high-quality glutamine supplement, NOW Sports L-Glutamine Double Strength is definitely worth considering.

Pros

  • Comprehensively tested for purity and effectiveness
  • Double strength with 1,000 mg per capsule
  • Critical for nitrogen balance and immune system health

Cons

  • May melt or become damaged if exposed to heat or sunlight
  • Large capsules may be difficult to swallow for some people
  • Some users report no noticeable effects

Buying Guide

When looking for the best glutamine supplement, it is important to consider several factors to ensure that you are getting a high-quality product that will meet your needs. Here are some key features to look for:

1. Form of Glutamine

Glutamine supplements are available in various forms, including powders, capsules, and liquids. Each form has its own advantages and disadvantages, and the best choice depends on your personal preferences and needs. For example, powders are easy to mix into drinks or food and can be more cost-effective, while capsules are convenient for on-the-go use.

2. Purity and Quality

Make sure to choose a glutamine supplement that is pure and of high quality. Look for products that are free of additives, fillers, and artificial ingredients. Additionally, check for third-party certifications, such as NSF or USP, which indicate that the product has been tested for purity and quality.

3. Dosage and Serving Size

The dosage and serving size of glutamine supplements can vary widely, so it is important to choose a product that fits your individual needs. Consider factors such as your body weight, activity level, and health goals when selecting a product. Additionally, be sure to follow the recommended dosage instructions on the product label.

4. Price

Glutamine supplements can vary in price, so it is important to find a product that fits your budget. However, keep in mind that cheaper products may not always be the best choice, as they may contain lower-quality ingredients or have lower dosages.

5. Additional Ingredients

Some glutamine supplements may contain additional ingredients, such as amino acids or other nutrients, that can enhance their benefits. Consider whether these additional ingredients align with your health goals and whether they are safe for you to consume.

By considering these factors, you can choose the best glutamine supplement for your individual needs and goals.

Frequently Asked Questions

1. What is the best form of glutamine to take?

L-glutamine is the most common form of glutamine supplement and is widely available. However, there are other forms such as glutamine peptides and N-acetyl L-glutamine. It is recommended to consult with a healthcare professional to determine which form of glutamine is best for you.

2. What is a good brand of L-glutamine?

There are several reputable brands of L-glutamine supplements available on the market. Some popular options include Optimum Nutrition, Jarrow Formulas, and NOW Sports. It is important to choose a brand that is reputable and has good customer reviews.

3. What happens if I take L-glutamine everyday?

Taking L-glutamine everyday within the recommended dosage is generally safe and well-tolerated. It may help support immune function, gut health, and muscle recovery. However, it is important to consult with a healthcare professional before starting any new supplement regimen.

4. Is it better to take glutamine or L-glutamine?

L-glutamine is the most commonly used form of glutamine supplement and is generally considered to be more effective than other forms. However, some individuals may prefer other forms such as glutamine peptides or N-acetyl L-glutamine.

5. What are the benefits of taking a glutamine supplement?

Glutamine supplements may help support immune function, gut health, and muscle recovery. It may also help reduce muscle soreness and improve exercise performance. However, more research is needed to fully understand the benefits of glutamine supplementation.

6. Can glutamine supplements help with muscle recovery?

Glutamine supplements may help support muscle recovery by reducing muscle soreness and promoting protein synthesis. However, it is important to note that glutamine supplements should not be used as a substitute for proper rest and recovery. It is important to consult with a healthcare professional before starting any new supplement regimen.

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