Doctor's Best L-Glutamine Powder helps muscle recovery and gut health, with a pure, single ingredient formula that stays true to clean-label values and trusted quality. L-Glutamine is the star ingredient, helping your muscles bounce back after tough sessions and supporting the gut lining. The brand keeps things simple and transparent with a vegan, non-GMO, gluten-free, soy-free formula and no fillers.

Benefits & Features:

• Supports muscle recovery after workouts.
• Powered by l glutamine, it fuels the gut lining and supports barrier function for daily resilience during busy training weeks.
• Pure, single ingredient formula with no fillers keeps the focus on l glutamine, while being vegan, gluten free, soy free and non-GMO for a clean label.
• Easy to mix into shakes and smoothies for convenient daily use.
• Ideal for active adults seeking reliable amino acid support for energy and recovery.

Doctor's Best has earned a reputation for purity and straightforward science-backed nutrition. This L-Glutamine powder is a single-ingredient solution, with 60 servings per 300-gram tub, designed for active adults who want real, transparent ingredients. The formula is vegan, non-GMO, gluten-free and soy-free with no fillers, delivering clean amino acid nutrition you can trust. It blends easily into shakes, making daily support for muscle recovery and gut health supplements simple.

L-Glutamine, L-Glutamine

• GTIN: 753950004917
• Manufacturer: Doctor's Best
• Categories: Best SellersDoctor’s Best Supplements & VitaminsGut Health SupplementsL-Glutamine Supplements, Powders & TabletsSubscribe & Save Products
• Best buy: 6 - 24 months+

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

Add 1 scoop (5 grams) to 240 ml (8 ounces) of juice or a protein shake and mix well. For best results, consume 1 hour before exercise and repeat after exercise or before bedtime, or as recommended by a nutritionally informed physician. Store in a cool, dry place. Avoid using if you are pregnant, nursing, or have liver problems. If you are sensitive to monosodium glutamate (MSG), you may be sensitive to glutamine as the body converts glutamine to glutamate. It is recommended to supplement with B vitamins if taking L-glutamine long term.

Please consult the product packaging for accurate instructions on how to use the product.

*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

The Active Ingredient Is: L-Glutamine

L-Glutamine is a conditionally essential amino acid that acts as a primary nutrient for numerous body systems. This product carries pure L-Glutamine in powder form, supplied as a single-ingredient supplement.

It is characterised by its role as an amino acid found in this simple, single-ingredient powder mix.

What Does L-Glutamine Do?

L-Glutamine helps to support immune cell function and enterocyte (gut lining) activity, and it is taken up by muscle cells where it could help support muscle protein synthesis during stressful periods.

Dr. Gleeson from a university found that L-Glutamine is a main fuel for intestinal cells and can take part in muscle recovery processes, reinforcing its role in gut health and post-workout recovery.

This product isn't meant to diagnose, treat, cure, or prevent any disease.

This product isn't meant to diagnose, treat, cure, or prevent any disease.

Doctor's Best is picked for its pure, single-ingredient focus, delivering L-Glutamine in a clean, plain, straightforward formula that honours clear label transparency and simplicity. This brand is recognised for high-purity amino acid products that line up with active lifestyles and recovery goals, which mirrors our emphasis on clarity and potency in this space. Our expert team checked Doctor's Best against peers to ensure a solid fit for a muscle support and recovery supplement, considering the brand’s established approach to purity and straightforward ingredient statements. We emphasise partner selection with a focus on strong quality checks, backed by our rigorous testing protocols that inform every product we list on Welzo. The decision to collaborate with Doctor's Best reflects a shared commitment to reliability, reproducible purity, and customer trust, shown by their targeted, single-ingredient formulation. For the collaborative vetting, learn more from our expert team of doctors, nurses, and nutritionists and how this brand lines up with our standards of safety and quality.