Optimum Nutrition L-Glutamine Muscle Recovery Powder - 5g Per Serving

In this review the focus is on recovery-focused athletes and regular gym-goers who want a simple, concentrated amino acid supplement. The bottom line: Optimum Nutrition L-Glutamine delivers a clean, unflavored 5 g dose of L-glutamine per serving in an instantized powder that mixes easily and stacks with protein shakes; it is best chosen by anyone who wants a straightforward way to support post-workout recovery without added flavors or fillers. The reviewer found it especially useful for those who train frequently and need a reliable, GMP-certified powder to top up depleted glutamine pools.

Key Features

• Highly concentrated: Each serving supplies 5 g of pure L-glutamine, making it easy to hit a recovery dose without extra volume or additives.
• Unflavored formula: The instantized, unflavored powder mixes smoothly into water or shakes so it can be stacked with protein without changing taste.
• Muscle support: L-glutamine is the most abundant amino acid in skeletal muscle, which may help reduce post-exercise soreness and support muscle protein rebuilding.
• Easy to use: One heaping teaspoon mixed with 8 fl oz of water or beverage provides a convenient single-serve approach for daily recovery routines.
• Quality assurance: Manufactured under GMP guidelines for consistent purity and concentration, which matters for repeatable dosing.

Who It's For

This product suits strength athletes, endurance athletes, and frequent gym attendees who want a no-frills L-glutamine supplement to support recovery and muscle maintenance. Because it is unflavored and concentrated, it is particularly good for people who already use protein powders or flavored beverages and prefer to add glutamine without affecting taste.

Those who want flavored intra-workout drinks, multi-ingredient recovery blends, or who need personalized dosing beyond the single heaping teaspoon may prefer a flavored or multi-component product. Also, customers in hot climates should ensure they are available at delivery, as exposure to heat or sunlight may affect the product.

Pros & Cons

Pros

• Provides a full 5 g dose of pure L-glutamine per serving in a compact powder form.
• Unflavored and instantized for easy mixing with protein shakes or plain water.
• Simple directions and GMP manufacturing give predictable, repeatable results.

Cons

• Unflavored format means those who prefer flavored supplements will need to mix with another product.
• Product can be sensitive to heat or direct sunlight during delivery, so timing of receipt is important.

Specifications

Brand	Optimum Nutrition
Form	Instantized powder, unflavored
Serving size	One heaping teaspoon
Amount per serving	5 g L-glutamine
Net weight	1000 gram
Suggested use	Mix with 8 fl oz water or beverage
Quality	GMP certified

Our Verdict

Optimum Nutrition L-Glutamine is a practical, no-nonsense recovery powder for people who need a concentrated 5 g dose without flavors or fillers. It is good value for athletes who already use shakes and want to stack glutamine easily, though those seeking flavored options or complex recovery blends should look elsewhere.

Frequently Asked Questions

How do I take this glutamine powder?
Mix one heaping teaspoon with about 8 fl oz of water or your favorite beverage as part of a balanced diet and exercise program.

Is this product flavored?
No, the powder is unflavored and designed to mix with protein shakes or plain water without adding taste.

Any special delivery considerations?
Exposure to heat or sunlight may damage the product, so customers should be available at delivery or choose a cooler delivery option when possible.