If you’re into fitness or just trying to support your gut and immune system, you’ve probably heard about L-glutamine. It’s one of the most abundant amino acids in your body, and it plays a key role in muscle recovery, intestinal health, and immune function. But with so many options out there, picking the right supplement can feel overwhelming. That’s where we come in. In this NOW L Glutamine Capsules review, we break down three popular products from NOW Foods and NOW Sports so you can find the perfect match for your lifestyle. Whether you need a gentle daily dose or a double-strength option for intense training, we’ve got you covered. If you’re also curious about other glutamine brands, check out our pure encapsulations L-Glutamine review for a comparison of capsules vs. powder.
Pros
- High-quality, pure L-Glutamine from a reputable brand
- Supports immune health and nitrogen balance
- Easy-to-swallow capsules with no strong taste
- Affordable price for a 120-count bottle
- Suitable for vegans (veg capsules)
Cons
- Some users may prefer powder form for higher doses
- Capsules are 500 mg; may require multiple capsules for therapeutic doses
- No added flavor or extras, just pure amino acid
NOW Foods L-Glutamine 500 mg is a pure amino acid supplement designed to support immune function and nitrogen balance. It is ideal for athletes, active individuals, or anyone under physical stress who may need extra glutamine.
Glutamine is a conditionally essential amino acid, meaning the body may require more than it can produce during times of stress or intense training. This supplement helps replenish glutamine levels, aiding recovery and immune health.
Each capsule provides 500 mg of L-Glutamine in a vegetarian-friendly capsule. The bottle contains 120 capsules, offering a convenient supply. NOW Foods has been a trusted manufacturer since 1968, ensuring quality and purity.
While capsules are easy to take, those needing higher doses (e.g., 5-10 grams) may prefer a powder form to avoid swallowing many capsules. Additionally, the product contains no other ingredients, so it is a straightforward supplement.
Overall, NOW Foods L-Glutamine 500 mg is an excellent choice for targeted glutamine support. It is affordable, pure, and backed by a reputable brand. Recommended for those seeking to boost immune function and support recovery.
Color: White
Size: 120 Count (Pack of 1)
Dimensions: 2 x 2 x 4 Inches
Weight: 0.2 pounds
Product Group: Drugstore
Binding: Health and Beauty
Pros
- High potency means fewer capsules to swallow per dose.
- Third party GMP certification indicates rigorous quality control.
- Veggie capsules appeal to a wider range of dietary preferences.
- Established brand with a long history of customer trust.
- Good value for the number of servings per bottle.
Cons
- Capsules are larger due to double strength, which may be difficult for some people to swallow.
- Single ingredient supplement; may not be ideal for those seeking a comprehensive amino acid blend.
- No added flavor or mixability enhancements, so not suitable for use in drinks without additional flavoring.
The NOW Sports L-Glutamine 1000 mg Double Strength supplement is a high potency amino acid formula designed to support nitrogen balance and muscle recovery. It is ideal for athletes, bodybuilders, and active individuals who need efficient glutamine replenishment without taking multiple capsules.
What sets this product apart is its double strength concentration, providing 1000 mg of L-Glutamine per capsule. This means you can achieve your desired dosage with fewer swallows, a practical benefit for those who dislike taking many pills. The supplement functions as a key nitrogen transporter, which is essential for maintaining a positive nitrogen balance and supporting muscle tissue repair after intense exercise.
NOW manufactures this product in a GMP certified facility, ensuring every batch is tested for purity, potency, and stability. The company has been a trusted name in natural products since 1968, adding an extra layer of reliability. The capsules are vegetarian friendly, making them suitable for a broader audience.
Potential drawbacks include the capsule size, which is larger than standard due to the higher dose. Some users may find them harder to swallow. Additionally, this is a straightforward single ingredient supplement, so it lacks the added amino acids or flavoring found in some blends.
Overall, the NOW Sports L-Glutamine Double Strength is a well crafted supplement that delivers on its promises. It offers excellent value for those needing a potent, clean, and trusted glutamine source. We recommend it for serious athletes and anyone prioritizing recovery support.
Brand: NOW Sports
Product Name: L-Glutamine 1000 mg Double Strength
Form: Vegetable Capsules
Count: 240 Capsules per bottle
Strength: 1000 mg per capsule
Dimensions: 3.15 x 3.1 x 6.35 inches
Weight: 0.77 lbs (approx.)
Color: White capsule
Certification: GMP (NPA A-rated)
Brand Origin: USA, founded 1968
Pros
- Double strength reduces the number of capsules needed per serving
- Supports muscle recovery and nitrogen balance effectively
- High-quality manufacturing with GMP certification
- Trusted brand with decades of experience in natural supplements
- Vegetarian-friendly veg capsules
Cons
- May cause mild digestive upset in some individuals when taken on empty stomach
- Larger capsule size may be difficult for some to swallow
- Unflavored, so must be taken with a beverage or mixed into food
The NOW Sports L-Glutamine 1000 mg Double Strength capsules are a targeted amino acid supplement designed for athletes and fitness enthusiasts. Each capsule delivers a potent 1000 mg of L-Glutamine, the most abundant amino acid in the body, to support muscle recovery, immune function, and nitrogen balance. This product is ideal for those engaged in intense training, endurance sports, or anyone looking to optimize their post-workout nutrition.
The standout feature is the double strength formulation, which provides twice the L-Glutamine per capsule compared to standard versions. This means fewer capsules to swallow and more efficient dosing. As a nitrogen transporter, L-Glutamine helps maintain a healthy nitrogen balance, which is crucial for muscle protein synthesis and preventing muscle breakdown during stress or exercise. Real-world performance is solid; users report improved recovery times and reduced muscle soreness when taken consistently.
Design and build quality reflect NOW's commitment to excellence. The veg capsules are clean and easy to handle, and the bottle includes a clear label with dosing instructions. The manufacturing process is GMP certified and NPA A-rated, ensuring rigorous testing for potency and purity. The capsules are white and have a neutral taste, making them easy to incorporate into any routine.
One potential drawback is that L-Glutamine can cause mild bloating or gas in sensitive individuals, especially when taken on an empty stomach. Also, the capsules are a bit larger than average, which may be a concern for those with difficulty swallowing pills. Additionally, this supplement is unflavored, so it works best when mixed with a beverage or smoothie rather than taken alone.
Overall, the NOW Sports L-Glutamine Double Strength is an excellent choice for athletes seeking a high-potency, clean amino acid supplement. It delivers on its promise of supporting nitrogen balance and muscle recovery, backed by a trusted brand with rigorous quality standards. For the price and potency, it offers great value for anyone serious about their fitness goals.
Buying Guide: What to Look for in L-Glutamine Capsules
Choosing the right L-glutamine supplement depends on your goals, dosage preference, and budget. Here are the key factors to consider before you buy.
Dosage Strength: 500 mg vs. 1,000 mg
L-glutamine is available in different strengths. A 500 mg capsule is ideal for general wellness and gentle gut support, while a 1,000 mg double-strength capsule suits athletes or those needing higher intake. NOW offers both options, so you can scale up as needed. For more on timing your supplements, read our guide on when to take digestive enzymes for optimal gut health in 2026.
Capsule Count and Value
Think about how long you want the bottle to last. A 120-count bottle of 500 mg capsules gives you 120 servings if you take one daily. The double-strength 240-count option lasts even longer, making it a smart choice for regular users. Compare the number of capsules to your planned dosage to find the best value for your routine.
Quality and Manufacturing Standards
NOW Foods has been in the supplement game since 1968, and they follow strict GMP standards. Their manufacturing processes are NPA A-rated GMP certified, meaning every batch is evaluated for purity and potency. This is especially important for athletes and anyone with dietary sensitivities. For more on gut health supplements, visit our Digestive Health category page.
Strength and Dosage Flexibility
Not everyone needs the same amount of glutamine. The regular 500 mg capsules are perfect for general wellness and light support. But if you’re training hard or recovering from illness, the double-strength 1,000 mg capsules give you a bigger punch per capsule. You can even adjust by taking multiple capsules. If you’re new to amino acid supplements, check out our Doctor’s best PepZin GI review for another gut health option.
Final Thoughts
After comparing these three L-glutamine capsules from NOW, we recommend NOW Sports, L-Glutamine 1,000 mg, Double Strength for serious athletes and anyone needing a higher dose for muscle recovery or immune support. For everyday maintenance and a more budget-friendly option, the NOW Supplements, L-Glutamine 500 mg, Amino Acid is a solid choice that still delivers the trusted NOW quality. Both are excellent additions to your supplement stack, and you can choose based on your personal needs.
Frequently Asked Questions
What is L-glutamine good for? L-glutamine supports immune function and gut health. It helps maintain nitrogen balance in the body and is often used by athletes to aid muscle recovery. Many people also take it for digestive issues like leaky gut.
How much L-glutamine should I take per day? Typical doses range from 500 mg to 2,000 mg per day, depending on your goals. Start with a lower dose and increase as needed. Always follow the label instructions or consult a healthcare professional.
Can I take L-glutamine on an empty stomach? Yes, you can take L-glutamine between meals for better absorption. Some people prefer taking it with food to avoid any stomach upset. For more timing tips, read our guide on when to take digestive enzymes for optimal gut health.
Are NOW L-glutamine capsules vegetarian? Yes, all three products listed here are vegetarian capsules. They are also non-GMO and free from common allergens like gluten and soy.
