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Power up your workout with L-Citrulline to support circulation as well as muscle building and recovery from exertion. read more

25 in stock




200 g

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Product overview

Doctor’s Best L-Citrulline is a well-studied amino acid precursor to L-Arginine which is responsible for building muscle and supports nitric oxide (NO) production, a key molecule involved in a variety of essential biological functions throughout the body, particularly in supporting the regulation of vascular tone and improving blood oxygenation for improved stamina and recovery from exertion.

  • Supports circulation, vascular tone and muscle maintenance.
  • Plays a role in Nitric Oxide (NO) metabolism and vascular dilation.
  • Effectively raises L-Arginine levels responsible for higher protein synthesis and protein content in muscle during exercise.
Why L-Citrulline?

L-Citrulline, commonly found in founds such as watermelon, cucumbers and squash, is one of three dietary amino acids involved in the urea cycle that detoxifies ammonia by converting it to urea for excretion from the body. It’s also a natural precursor to the amino acid L-Arginine, which is poorly available for cells in the body as a significant portion is broken down in the intestines before it reaches the circulation. Research has shown that L-Citrulline is more effective than L-Arginine in raising circulating L-Arginine levels because it is able to bypass metabolism in the gastrointestinal tract and liver.

How does it work?

L-Citrulline is able to raise levels of L-Arginine in the body which is an essential precursor for the body’s natural muscle building process. It also supports muscle fatigue recovery through the elimination of ammonia. L-Citrulline plays an important role through its conversion and support of L-Arginine in the regulation and metabolism of nitric oxide (NO) in the body. Increased nitric oxide promotes the dilation of blood vessels which improves blood flow, and the degree of oxygenation available to cells throughout the body.

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-Citrulline (Kyowa Quality) 3 g. Other ingredients: None.

Does not contain: GMO, Gluten, Soy, Artificial Flavours, Colours, Preservatives. 100% vegan.

Suggested Use

Recommended intake:

Suggested Adult Use: Take 1 scoop daily with 250 ml water or juice, before workouts, or as recommended by a health practitioner.

  • Do not use in conjunction with vasodilating medications.
  • If pregnant, nursing, have thyroid or kidney problems, or using blood thinning medication, consult a healthcare practitioner prior to use.
  • 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-00437 Category:
DRB L Citrulline 200g FRONT
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