The 5 Best L-Glutamine Supplements, According to Registered Dieticians

“One of my favorite L glutamine powder products is from Thorne. I love this as it’s NSF Certified, and it’s easy to dissolve in a liquid,” says Nicole Ibarra, RD, LD, a registered dietitian and author specializing in Sports Nutrition and Fitness.

Thorne has a reputation for quality, and their L-glutamine powder follows suit. With third-party verifications ensure it’s free from substances banned for athletes, there’s an extra layer of assurance when adding this to your routine.

The powder is unflavored and tasteless, and while you can mix it with water, many people combine it with other supplements like protein or creatine to make the most of their beverage. Each container has ninety 5-gram servings, and you can save an extra 20% on your order by choosing the subscribe and save option.

Read more: Best Multivitamins for Men

Momentous L-Glutamine

For a budget-friendly option that’s still top quality, try Momentous L-glutamine powder. Each serving has 5 grams of glutamine in an unflavored powder that mixes with water or your morning smoothie.

The pure L-glutamine powder has no sweeteners, colors, or other additives and is vegan and free from soy and gluten.

Unlike many other glutamine supplements, Momentous comes in a resealable bag. While this will take up less space in your pantry, it can be difficult to scoop the last few servings out, and if powder gets on the seal, hard to fully close.

You’ll get 60 servings in each bag, costing just $0.64 per serving. You can save even more by choosing a subscribe and save option, bringing the cost down to as low as $0.51 per serving.

Cellucor BCAA Sport Hydration Powder

If you’re using L-glutamine to assist with muscle recovery, Cellucor BCAA Sport Hydration Powder adds the power of branched-chain amino acids and electrolytes to glutamine to help you recover from tough workouts.

Each serving of this recovery powder has 8.25 grams of amino acids plus 2 grams to glutamine. Some research has found that supplementing with branched-chain amino acids can help reduce muscle soreness after exercise. You’ll also get 110 miligrams of sodium and 172 milligrams of chloride to replace a small amount of electrolytes as you hydrate. It’s also NSF-Certified for Sport, so you know it’s free from any banned substances.

The powder mixes well with water or juice, although some people report an artificial taste, most likely because of the artificial sweeteners. You can find this supplement at any major grocery store or online.

“L-glutamine helps to keep the gut lining’s tight junctions intact, which can help reduce risk of leaky gut, and helps to reduce pro-inflammtory pathways,” says Ibarra. Whether you’re using it to ease sore muscles, strengthen your immune system, or support a healthy gut, MusclePharm Glutamine has 5 grams of L-glutamine in each serving at a budget-friendly price.

This powder mixes well with water by itself or when combined with protein powder and is Informed Choice Certified, so you know you’re getting what the package says and nothing else. It’s by far one of the lowest-costing glutamine supplements and still high quality with testing and certifications behind it.

Klean Glutamine

Each container of Klean Glutamine contains ninety 5-gram servings of L-glutamine. This unflavored, fine powder is free from artificial flavors, sweeteners, or additives, so you know you’re only adding glutamine to your diet. As an NSF-Certified for Sport supplement, you can also rest assured that it’s free from any banned substances.

While this supplement mixes well with any liquid, you can use it as a companion to other supplements like protein powder or creatine, both of which can also help with muscle repair and recovery, independent of glutamine status.

Meet the Experts

• Brian St. Pierre, MS, RD, CSCS, CISSN, Pn1, is the Director of Performance Nutrition at Precision Nutrition.
• Kristin Draayer, MS, RDN, CPT, is a registered dietitian and certified personal trainer at Kristen Draayer Nutrition and Fitness.
• Nicole Ibarra, RD, LD, is a registered dietitian and author specializing in Sports Nutrition and Fitness.