You're looking for a supplement to improve your gut health, muscle mass, immunity, and workout recovery.

But you don't want to take any old supplement- you want the best Glutamine supplement out there.

We've got just what you're looking for. We have gathered some of the best Glutamine supplements every option packed with L-Glutamine, helps improve all of those things and more. It's perfect for athletes or anyone who wants to feel their best!

We've curated a list of top-quality products below that we're confident you'll love. Our editors have independently selected each one, and although some have been sent to us as samples, all opinions in this article are our own. We want to be transparent with you and let you know that FlairFindings may earn a commission or other compensation from the links on this page if you decide to make a purchase. This is how we sustain our business & content flow. Additionally, we have edited reviews for length and clarity. We hope you enjoy discovering your new favorite item!

How We Select The Best

Are you looking for a way to improve your digestion?

A lot of people have trouble with their digestion, and we’ve found that the best way to help is by taking glutamine supplements. L-Glutamine is an amino acid that can help improve our digestive health.

We’ve all been there – feeling bloated and uncomfortable after eating a big meal. But with glutamine supplements, you can reduce those feelings and finally get relief. Not to mention, they can also help increase your energy levels and support your immune system!

Keep scrolling to learn more about the best glutamine supplement for you!

Best Amino Acids for Gut Health

Thorne L-Glutamine

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What's the Big Deal?

Thorne Research L-Glutamine is the perfect supplement for anyone looking to improve their overall health. This product delivers superior glutamine, an amino acid essential for improving the health of your gut, nervous system and muscles.

Formulated to provide healing benefits in cases of leaky gut and indigestion, this product can help remove toxins that cause stomach burn. It also helps eliminate fatigue after exercise or injury so your muscles can fully recover with the help of one daily dose. Get ready to experience improved immunity and gut health with L-Glutamine from Thorne Research today!

What You Should Know

Thorne's L-Glutamine capsules are an excellent source of a 500 mg dose of this key nutrient. Containing 90 hypromellose and silicon dioxide capsules, they're completely free from allergens like egg, peanuts or tree nuts (as well as lactose, yeast calcium magnesium shellfish dairy vegetable stearates or soy).

The recommended dosage for these powerful supplements is just one capsule daily - but we recommend speaking to your healthcare provider first before taking them if you’re pregnant/lactating and have severe health issues.

Best for Immune Health Support

Life Extension L-Glutamine

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What's the Big Deal?

Life Extension provides premium vitamins and supplements for a healthy lifestyle. Its L-Glutamine is best for boosting energy and is beneficial for athletes. When you do heavy workouts, your Glutamine levels get affected, resulting in stress in the body. Not anymore, as you consume Life Extension L-Glutamine. It keeps your muscle health in balance by supporting antioxidant defenses.

Life Extension has created this formula with pure raw ingredients with all the power your body needs. This supplement is manufactured in the USA and certified as gluten-free and non-GMO L-Glutamine.

What You Should Know

In the Life Extension L-Glutamine supplement, you get 100 vegetarian and unflavored capsules. Each capsule gives you 500 mg of L-Glutamine the most abundant amino acid. The other ingredients include vegetable cellulose, rice flour, microcrystalline cellulose, and stearic acid.

While taking L-Glutamine capsules, you feel active because of the immunity boost, and your mood improves. The manufacturer takes care of the ingredients and dosage recommended in scientific studies to provide maximum effectiveness. Furthermore, people with kidney and liver disorders should consult their doctor before taking these capsules.

Best for Energy Management

Essential Stacks Gut L-Glutamine

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What's the Big Deal?

Essential Stacks is a renowned food supplement provider that aims to keep your gut health effortlessly good. When your body lacks L-Glutamine, it leads to poor gut health. This Gut L-Glutamine powder takes control of your poor gut by strengthening the gut wall and keeping all the toxins out.

If you are a person suffering from belly bloating, embarrassing gasses, constipation, or diarrhea, having poor gut health may be responsible for it all. When you consume this supplement regularly, there will be no such issues as your gut health improves. This product is made, tested, and packaged in the USA.

What You Should Know

The container has 10.6 ounces of L-Glutamine powder. You will get 60 servings per container, and each scoop will be almost 5 grams. Each serving will give you 5 grams of L-Glutamine powder free-form. You can take it by mixing one scoop of L-Glutamine powder in 8 ounces or 240 ml water. Furthermore, you can take it once or twice a day and is best to take it between meals.

This L-Glutamine powder has no amino acids, soy, egg, shellfish, nuts, wheat, casein, dairy, or artificial flavors and colors. Also, it is gluten-free. Men and women with a sensitive gut can take it comfortably.

Best for Digestive Balance

Doctor Danielle Gut Assist

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What's the Big Deal?

Doctor Danielle is a renowned organic food supplement provider. It introduced Gut Assist, which helps keep your gut healthy and improves overall health. By consuming Gut Assist, your body's protective membrane and GI track get the L-Glutamine nutrient which improves healing.

When your Gut is healthy, your immunity improves, there will be no bad mood. When the gut is healthy, the digestive system will work well, and there will be no constipation, bloating, cramps, gas, or diarrhea. This product is vegetarian and vegan; there is no animal product.

What You Should Know

This container of 7.9 ounces has 40 servings of 5.6 grams scoop each. In each serving, you get L-Glutamine, Arabinogalactan, Deglycyrrhizinated Licorice Extract, and Aloe vera Extract. They help gastrointestinal function to stay stable; defend against infections; support the intestinal wall and stomach's muscle lining and has healing and anti-inflammatory properties. Furthermore, Aloe vera Extract improves healing.

This supplement is sugar-free and gluten-free with no fillers. Mix one scoop of Gut Assist in 4 to 6 ounces of water. We recommend pregnant and lactating women not use this product without a doctor's advice.

Best for Stomach Discomfort

Terra Origin Healthy Gut Berry with L-Glutamine

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What's the Big Deal?

Terra Origin is an ancient source of modern wellness to promote healthy life and longevity. A healthy gut lets you do whatever you want to and eat whatever you want to eat. This L-Glutamine formula by Terra Origin has herbs and vitamins that support your gut and digestive system.

Terra Origin doesn't add any fillers or preservatives in the formula to keep the standard. This formula supports gastrointestinal health to elevate the nutrition extraction from our food.

What You Should Know

The container has 8.57 ounces of Glutamine powders. You get 30 servings in each pack of approximately 8.1 grams each. Each scoop has 5 grams of L-Glutamine, 20 calories, 215 mg of Zinc, and 1 mg of copper. Other ingredients include potassium, Glucosamine, aloe vera leaf extract, Marshmallow Root, and quercetin dihydrate. So it has all your gut needs to stay healthy.

Mix one scoop of L-Glutamine supplement powder in 6 ounces of water. Mix it well and drink it between meals, you can take it once or twice daily. The Terra Origin offers L-Glutamine supplements in many tasty flavors.

Benefits, Dosage, and Side Effects

Here's the benefits, dosage and side effects of Glutamine supplements.


Glutamine supports our immune system. Our white blood cells fight against infections and diseases, and these cells get their main fuel from Glutamine. Glutamine regulates our intestinal health. These essential amino acids maintain the intestinal lining while ensuring that the body absorbs all the required nutrients.

This way, Glutamine fights against leaky gut syndrome. Also, it benefits other gut conditions like celiac disease and gut inflammation. Glutamine also maintains muscle protein & branched chain amino acids; many athletes use it as a fitness supplement. It assists in burning fat and gaining muscles.


If you are new to Glutamine, we recommend starting with a low dosage. However, it is necessary to consult your healthcare provider before taking any supplement, including Glutamine bulk supplements.

On average, the daily dosage of 5 to 45 grams of Glutamine is safe for up to six weeks, and there will be no side effects. However, it also depends on your body's needs.

Side Effects

Your body produces Glutamine, and the food you eat also has it. Therefore, consuming Glutamine more than your body needs may have potential health risks. Some people face bowel movement changes and cough with the usage of Glutamine. Heavy Glutamine usage may result in skin color change or rash, dizziness, blood in urine, increased heartbeat, and lower back pain.

Pregnant and lactating mothers should consult their doctor before consuming this supplement to prevent the baby from any serious ailments. Glutamine is not for people with liver and kidney conditions, as it may worsen the situation.

Visit your healthcare provider immediately if you feel discomfort or another health problem; the cause can be Glutamine.

Glutamine Supplement FAQs

What form of Glutamine is best?

L-Glutamine is the most basic form that our body produces. The food we consume daily also has about 3-6 grams of it. It is the fuel to our immune and intestinal cells.

Which is better, L-Glutamine or Glutamine?

The 'L' in the L-Glutamine indicates the Glutamine supplementation your left side of the body uses. That's why there is no difference if we say Glutamine or L-Glutamine; both are the same.

Is Glutamine better in pill or powder?

One research study showed that L-Glutamine powder absorbs better in the body than capsules.

How much L-Glutamine should you take daily?

Adults can take 40 grams of L-Glutamine per day for up to 16 weeks with or between meals, and children can take L-Glutamine according to the doctor's advice.

Who should not take Glutamine?

Glutamine is not safe for people with kidney or liver conditions and people with Reye's syndrome, which is a severe condition in which the liver and brain get swollen. As well if you're pregnant or lactating.

Is it safe to take Glutamine every day?

Glutamine is safe to take daily if the dosage is not above 40 grams. However, prolonged usage of Glutamine can have potential health risks.

What are the negative effects of Glutamine?

Some side effects of Glutamine include changes in skin color, blood in urine, cold hands and feet, increased heartbeat, and frequent and painful urination.

Is Glutamine worth taking?

Glutamine maintains muscle protein and helps muscle growth and burn fat. Also, it is an essential fuel to our gut health and keeps us happy and energetic.

Does Glutamine cause weight gain?

There is no proven evidence that the intake of Glutamine increases weight. It affects lean muscles and improves them. Also, it helps in burning fats.

How do I know if I need L-Glutamine?

You need the L-Glutamine supplement if you experience anxiety, constipation, sugar or alcohol cravings, diarrhea, low muscle mass, a weak immune system, and slow workout muscle recovery.

Final Word

We discussed pure Glutamine supplements, their benefits, potential health risks, safe daily dosage, and popular supplements available in the market. We have also cleared most of your uncertainties regarding Glutamine supplements by answering your most common questions.

If you feel a lack of Glutamine in your body you can start with any of the best Glutamine supplements mention in this article and if your still uncertain consult your healthcare provider for a more definitive explanation. There will no longer be low energy levels, constipation, diarrhea, or low muscle mass to keep you upset, and the result will be visible within days.