What is glutamine used for?

It is the most common amino acid in muscle. People take it around training and recovery. But a protein-rich diet already supplies it.

It is sold on Amazon UK. It is also sold direct from Optimum Nutrition. Check the live price on each site.

Mix the unflavoured powder into water, juice or a protein shake.

Is it banned-substance tested?

Yes. It has Informed Choice certification.

Certification status

✓ Informed Choice

Informed Choice

Amino Acids

Optimum Nutrition Glutamine Powder

Name: Optimum Nutrition Glutamine Powder
Brand: Optimum Nutrition
Rating: 4.5 (929 reviews)

This is pure L-glutamine powder from Optimum Nutrition. It is one ingredient and unflavoured. You mix it into water or a shake. It is Informed Choice certified. That means it is tested for banned substances. It is sold on Amazon UK and direct from Optimum Nutrition.

Buy in the UK

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Why this certification matters

Informed Choice: Informed Choice provides additional assurance for recreational athletes and supplement users who want products tested for banned substances.

Frequently asked questions

What is glutamine used for?: It is the most common amino acid in muscle. People take it around training and recovery. But a protein-rich diet already supplies it.
Where can I buy it?: It is sold on Amazon UK. It is also sold direct from Optimum Nutrition. Check the live price on each site.
How do you take it?: Mix the unflavoured powder into water, juice or a protein shake.
Is it banned-substance tested?: Yes. It has Informed Choice certification.

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