Supplement Reviews

10 Best Glutamine Supplement According to Customers

Glutamine is the most common amino acid found in the body. Therefore, glutamine supplement helps your body synthesize proteins, other amino acids, and glucose.

Moreover, supplementing glutamine can help digestive and immune functions.

You can take them for the following reasons:

  • Manage swelling of the mouth sickle-cell disease
  • Burns
  • Boost recovery after surgery and injuries

Studies show that glutamine helps decrease the risk of infections and boosts health during recovery from sickness.

Some of the best glutamine supplements are discussed further below:

10 Best Glutamine Supplement According to Customers

1. ON (Optimum Nutrition) Glutamine Powder.

Glutamine Supplement: Optimum Nutrition

This is one of the best glutamine supplements on the market.

To take it, mix one rounded teaspoon of Glutamine Powder with 8oz of water or your favorite beverage.

What you will love about it

  • It is amazing for muscle recovery.
  • It takes away pain brought by overtraining and strenuous work in general.
  • In addition, it removes soreness.
  • It mixes well.
  • It also helps to increase MPS.
  • Finally, it is Informed Choice Certified and Banned Substance Tested.

What you may not like

  • It may cause excess weight gain.
  • Stomach pain.
  • Diarrhea.
  • Nausea.
  • Also, fever.
  • Finally, it leaves an off-putting flavor in beverages.

It has a rating of 4.7 out of 5 stars on Amazon.

Order ON (Optimum Nutrition) Glutamine Powder, 0.55 lb, Unflavoured

2. Life Extension L-Glutamine

Life Extension L-Glutamine

Life Extension L-Glutamine is a supplement to improve mood, muscle, and immunity function.

It supports muscle gain. In addition, it helps maintain energy levels under stressful occasions.

It boosts the immune system.

The product also supports antioxidant defenses to maintain muscle health.

Also, it’s healthy for anyone living an active lifestyle, like athletes.

 Take half a teaspoon every day on an empty stomach or as prescribed by the doctor.

What you will love about it

  • It’s a high-quality product.
  • Increases energy levels.
  • Reduces muscle pain.
  • It is also an immunity booster.
  • It is a certified non-GMO and gluten-free product.
  • The product is vegan-friendly.

What you may not like

  • It is costly.
  • Nausea.
  • Vomiting.
  • Hives.
  • Also, joint pain.
  • Misleading pricing and weight.
  • Does not help with weight loss.
  • Additionally, it does not work as said.

It has a rating of 4.5 out of 5 stars on Amazon.

Order Life Extension L-Glutamine on Amazon.

3. Earthborn Elements L-Glutamine.


Earthborn Elements L-Glutamine is a natural amino acid that helps digestion and muscle mass.

In addition, it’s additive and gluten-free, and non-GMO. It is a pure amino acid that helps improve the digestive system.

Take two capsules once daily, preferably with meals or as directed by your doctor. Take with 8 oz of water.

What you will love about it

  • It’s also a good supplement for a healthy gut.
  • It does not contain any fillers.
  • The capsules are very effective.
  • It’s a simple supplement without a bunch of other ingredients mixed in.
  • It helps boost weight loss and muscle gain.

What you may not like

  • No difference noticed
  • Heartburn.
  • Dizziness
  • Stomach issues.
  • Also, bloating.

It has a review of 4.3 out of 5 on Amazon.

Order Earthborn Elements L-Glutamine on Amazon. 

4. Nutricost L-Glutamine Powder

Nutricost L-Glutamine Supplement

It’s a high-quality L-Glutamine powder made in GMP compliant facility.

It is free from- non-essential amino acids, and it’s all-natural.

When used as a dietary supplement, mix one scoop daily of 6-10 OZ of water as directed by your healthcare professional.

What you will love about it

  • Weight loss supplement and gut health
  • Good pricing.
  • No bloating
  • Also, great potency
  • It promotes gut health.
  • Helps in muscle growth.
  • It assists in recovery.
  • The product provides gastrointestinal support.
  • It’s an energy booster.
  • It’s vegetarian-friendly.
  • Furthermore, it is good for immunity.

What you may not like

  • It has a chalky taste
  • It does not dissolve fully.
  • Excessive sleeping.
  • Stomach pain.
  • Dizziness.
  • Has a weird flat taste.
  • It has no flavor.
  • It is also not retainable.
  •  The powder can cause bloating and nausea.

It has a rating of 4.6 out of 5 on Amazon.

Order Nutricost L-Glutamine Powder on Amazon.

5. NOW Supplement L- Glutamine

Now L-Glutamine Powder

NOW Supplements is one of the best glutamine supplements because it helps your body deal with stress.

In addition, it boosts immune system growth.

It enhances nitrogen balance.

Moreover, it enables muscle growth.

Take one to three capsules daily, preferably between meals.

What you will love about it

  • It relieves stomach acid.
  • In addition, it aids in weight loss.
  • It helps detox alcohol.
  • The supplement is of high quality and value.
  • It stops sugar cravings.
  • Finally, it is also easy to swallow.

What you may not like

  • It can cause indigestion.
  • It is expensive.
  • The product isn’t processed in a gluten-free facility, making it hard for people with allergies to use it.
  • Stomach issues like diarrhea are common.
  • It can cause migraines.
  • Also, dry mouth
  • It’s also a waste of money.

It has a star rating of 4.6 out of 5 on Amazon.

Order NOW Supplement L- Glutamine on Amazon. 

6. BulkSupplements L-Glutamine

Buy L-Glutamine Powder

This is a great glutamine supplement. This is because it helps boost athletic endurance.

In addition, it enables gut health.

It aids in post-workout muscle recovery.

It has no additives or flavors.

Furthermore, it helps in building the immune system.

Take 100mg of 1 to 3 teaspoons once or twice daily as prescribed by your doctor.

What you will love about it

  • It’s affordable.
  • It’s great for sickle cell patients.
  • High-quality product.
  • It’s also a great product for healing.

What you may not like

  • It’s unflavored.
  • It has terrible packaging.
  • Taking it can cause severe dizziness.
  • No noticeable difference.
  • It has a sour smell and taste.

It has a rating of 4.6 out of 5 on Amazon.

Order L-Glutamine Powder on Amazon. 

7. MuscleTech Glutamine Powder

MuscleTech Essential Series Platinum Glutamine Ultra

This is a highly effective glutamine supplement.

In addition to boosting muscle recovery after training, it helps maintain endurance through exercise.

It also increases cells in the body.

It provides immune support.

Moreover, it has no fillers or additives.

Mix 1 serving (1 scoop) with eight oz. of water or preferred beverage and drink 1 to 2 times daily.

On training days, take one serving 45 to 60 minutes before the workout and another serving 15 to 30 minutes after your workout.

What you will love about it

  • It dissolves well.
  • In addition, it has good pricing.
  • It helps with muscle recovery.
  • It’s also a good quality product.
  • Finally, it is also tasteless and odorless.

What you may not like

  • The serving size is too small.
  • It is not too noticeable.
  • It has a strange flavor when mixed with water.
  • Also, poor packaging.
  • Dizziness.
  • Cramping.
  • Nausea.
  • Also, vomiting.

It has a rating of 4.7 out of 5 on Amazon.

Order MuscleTech Glutamine Powder on Amazon

8. Fast&Up Glutamine.

Fast&Up Glutamine

These unflavored capsules help with muscle recovery. They have high-quality ingredients giving you clean nutrition.

In addition, they help with muscle metabolism.

Furthermore, Fast&Up products are tested & certified.

It also boosts muscle growth.

Mix 1 scoop with 250ml of water. Shake well to dissolve. Drink during or post-exercise on training days for recovery.

What you will love about it

  • It’s a high-quality product.
  • It comes in good packaging.
  • In addition, workouts feel different after taking the supplement.
  • It’s highly recommended for athletes.
  • It also reduces soreness.

What you may not like

  • Not the best taste.
  • Joint pain
  • Swelling in the hands or feet.
  • Headache.
  • Cramps
  • Also, back pain.

It has a rating of 4.4 out of 5 on Amazon.

Order Fast&Up Glutamine (Unflavoured, 2 Month Supply) L-Glutamine on Amazon.

9. Jarrow Formulas L-Glutamine

Jarrow Formulas, L-Glutamine Powder

Jarrow Formula helps boost muscle metabolism. The powder also promotes a healthy immune system.

In addition, it boosts gut health and digestion.

To take it, mix ½ teaspoon into 6 to 8 oz. of fluid and drink on an empty stomach.

What you will love about it

  • It’s good for healing and athletic performance.
  • It helps treat intestinal disorders.
  • The powder is essential for anyone with any mild form of leaky gut.
  • Moreover, it dissolves well
  • It is easy to swallow.
  • It’s good for healing the stomach lining.
  • Also, it’s affordable.

What you may not like

  • Terrible stomach pain and diarrhea.
  • It has an awful taste.
  • Back pain.
  • Stomach pain.
  • Headache.
  • Also, heartburn.

It has a rating of 4.6 out of 5 on Amazon.

Order Jarrow Formulas L-Glutamine on Amazon.

10. Pure Encapsulations L-Glutamine

L Glutamine Capsules | Pure EncapsulationsThis l-glutamine supplement helps with tissue repair from metabolic stress. In addition, it helps boost immunity.

The capsules speed up post-workout muscle recovery.

They also improve digestion and boost intestinal integrity.

Take 2–6 capsules daily in between meals.

What you will love about it

  • It dissolves in water quickly.
  • In addition, it helps with indigestion.
  • It helps manage addiction.
  • The capsules promote gut health.
  • Also, it helps get rid of stomach pains.

What you may not like

  • It doesn’t solve cravings and digestive problems.
  • Tasteless.
  • Stomach upset
  • Dizziness
  • Diarrhea.
  • Bloating.
  • Also, gas.
  • Finally, it’s expensive.

It has a rating of 4.7 out of 5 on Amazon.

Order Pure Encapsulations L-Glutamine on Amazon.


Ultimately, the best glutamine supplement has minimal side effects and fillers.

However, taking a glutamine supplement is important if you have a glutamine deficiency or are recovering from an injury or sickness.

You can get glutamine from natural protein sources like beef, milk, or tofu.

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