Top 10 Glutamine Supplements

These L‑glutamine supplements are commonly chosen to complement post‑workout nutrition and support recovery. We highlight pure powders and convenient capsules to suit every lifestyle.

  • ✅ Updated September 2025
  • 🏆 Best‑Selling
  • 📝 Editorial Reviews & Comparisons
Jamie’s Tip: Glutamine is often sold as pure powder — check if you’d prefer capsules for convenience, especially when travelling.
See Rankings ↓
1
Powder
Optimum Nutrition L-Glutamine Powder
Optimum Nutrition

L‑Glutamine Powder

4.6 / 5 (18,200 reviews)
Pure powder | 5 g per serving | Unflavoured | Mixes easily
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2
Powder
MyProtein L-Glutamine Powder
MyProtein

L‑Glutamine Powder

4.4 / 5 (9,900 reviews)
Unflavoured powder | ~5 g per scoop | 250 g, 500 g & 1 kg sizes | Value for money
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3
Vegan
Alpha01 L‑Glutamine Powder 150 g (Vegan Fermented)
Alpha01

L‑Glutamine Powder 150 g

4.3 / 5 (2,500 reviews)
Fermented vegan powder | 5 g serving | ~30 servings | Simple ingredient list
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4
Powder
Nutricost L‑Glutamine Powder
Nutricost

L‑Glutamine Powder

4.5 / 5 (7,300 reviews)
Gluten‑free powder | 5 g scoop | 250 g, 500 g & 1 kg tubs | Multiple flavours
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5
Powder
Applied Nutrition L-Glutamine
Applied Nutrition

L‑Glutamine

4.2 / 5 (2,100 reviews)
Pure powder | Approx 5 g per serve | Unflavoured | Mixes easily
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6
Powder
Warrior Glutamine 500g
Warrior

Glutamine 500 g

4.1 / 5 (1,900 reviews)
Bulk tub | 5 g serving | ~100 servings | Unflavoured & easy to mix
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7
Capsules
Swiss Bioenergetics L‑Glutamine 500 mg Capsules
Swiss Bioenergetics

L‑Glutamine 500 mg Capsules

4.0 / 5 (650 reviews)
500 mg per capsule | 120 capsules | Convenient for travel | Vegetarian friendly
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8
Powder
Reflex Nutrition L-Glutamine
Reflex Nutrition

L‑Glutamine

4.2 / 5 (1,400 reviews)
Fermentation process | 5 g scoop | 250 g & 500 g tubs | 50–100 servings
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9
Capsules
Nutrivo L‑Glutamine 800 mg Capsules
Nutrivo

L‑Glutamine 800 mg Capsules

3.8 / 5 (420 reviews)
800 mg per capsule | Typically 365 capsules | Convenient daily dosing | Vegetarian
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10
Capsules
Now Sports L‑Glutamine Capsules
Now Sports

L‑Glutamine Capsules

4.1 / 5 (2,800 reviews)
1 g per capsule | Non‑GMO | Tested for purity | Easy to swallow
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Top Glutamine Picks (Compared Side by Side)

🥇 ON Glutamine 🥈 MyProtein Glutamine 🥉 Alpha01 Glutamine
Form Powder Powder Powder
Serving Size 5 g 5 g 5 g
Servings per Pack ~60 ~50–200 ~30
Flavours Unflavoured Unflavoured Unflavoured
Purity & Extras 100% L‑Glutamine; no additives 100% L‑Glutamine; multiple tub sizes Fermented & vegan‑friendly
Mixability/Texture Fine powder; dissolves easily Fine powder; dissolves easily Fine powder; dissolves easily
Value for money 3.5/5 Best Value 4.0/5 3.0/5
Overall Excellent Excellent Good
Best for Trusted Choice Budget Pick Vegan Friendly

For general comparison purposes, amounts and servings are approximate and taken from product labels. All “Value for Money” scores are editorial ratings based on the author’s independent assessment. Information is for general purposes only.

FAQs

What does glutamine do?

Glutamine is an amino acid found naturally in your body. It plays a role in protein synthesis and may support immune and gut function. Supplementing can help maintain levels during intense training or periods of dietary restriction.

How should I take a glutamine supplement?

Most powders recommend around 5 g per serving mixed into water or shakes. Capsules offer smaller doses that can be taken with meals. Follow the directions on the label and adjust according to your needs.

Can I mix glutamine with protein shakes or BCAAs?

Yes. Glutamine is often added to protein or amino acid drinks. It dissolves easily and has little taste when unflavoured, so it blends well with other supplements.

Is glutamine a replacement for protein intake?

No. Glutamine supplements provide a single amino acid and are intended to complement a balanced diet. They shouldn’t replace complete protein sources or meals.

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