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What do stress, intense physical exercise, injury and illness all have in common? The essential need of supplemental L-Glutamine to fuel growth and recovery! read more

77 in stock




300 g

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Product overview

Doctor’s Best L-Glutamine Powder supplies a high level of the amino acid glutamine, a building block of protein, and essential support for all things muscle – it’s growth, mass, strength, recovery, hydration and endurance. It is also plays an important role in energy production, as the major fuel source for the liver, intestines and immune system.

  • Much-needed support for muscle mass and strength.
  • Involved in muscular hydration to support post-workout recovery.
  • Supports athletic stamina and performance.
  • Assists in maintaining a healthy immune system for athletes.
  • Essential energy source for gastrointestinal cells to support a healthy mucosal layer and intestinal permeability
Why L-Glutamine?

L-Glutamine is the most abundant free amino acid in the body. It is mainly made in the muscles, liver and lungs, but when the body is sick, injured, under stress or subject to intense physical demands our need for this critical amino acid exceeds our capacity to produce it in necessary amounts. As a building block of protein, L-Glutamine plays a significant role in muscle growth, development, strength and recovery, and it also plays a vital role in energy production as the major fuel source for the liver, intestines and immune system.

L-Glutamine has become widely known and used for its ergogenic capabilities, improving physical performance, stamina and recovery after intense exercise among athletes. It is also very popular for its role in immune health and exercise. It is also converted in the body to glutamic acid, a precursor to the neurotransmitter GABA.

About Doctor’s Best

Doctor’s Best creates vitamins and supplements using science-based techniques that combine natural ingredients using thoroughly researched and tested methods. Doctor’s Best is committed to transparency and education and uses only certified cGMP facilities to ensure the highest quality standards are met.


L-Glutamine 5 g. Other ingredients: None.

Does not contain: GMO, Gluten, Soy. 100% vegan.

Suggested Use

Recommended intake:

Suggested Adult Use: Add 1 scoop to 250 of juice or protein shake and mix well. For best results, drink 1 hour before exercise. Repeat after exercise or before bedtime, or as recommended by a health practitioner.

  • Avoid use during pregnancy, breastfeeding or with liver problems.
  • Use caution if sensitive to monosodium glutamate (MSG), which may include sensitivity to glutamine as the body converts glutamine to glutamate. It is recommended to supplement with B vitamins if taking L-glutamine long term.
  • Store in a cool dry place.
  • Do not use if safety seal is broken or missing.
  • Keep out of reach of children.
  • Always read the label and use as directed. If symptoms persist see your healthcare practitioner.


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SKU: DRB-00491 Category:
DRB L Glutamine 300g front
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