Natural Factors L-Arginine, 500mg, 90 cap

Natural Factors L-Arginine, 500mg, 90 cap

Natural Factors

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Natural Factors L-Arginine is a non-essential amino acid involved in protein synthesis. It may also help support a modest improvement in exercise capacity in individuals with stable cardiovascular diseases (CVD).

L-arginine is a conditionally essential amino acid, which means although it can be manufactured by the body, during times of illness, stress, and recovery from injury, the body may need more than it can produce on its own. L-arginine plays a critical role in the production of nitric oxide, a substance that relaxes blood vessels, helping to improve blood flow. A deficiency of L-arginine can disrupt many cellular functions in the body, including those of the blood vessels.

As a free-form amino acid, L-arginine is easier for the body to absorb and use than when consumed in the form of protein from food, such as dairy, meat, and fish. Available in two strengths, L-arginine is free from preservatives, sweeteners, gluten, and GMOs. L-arginine is a great choice for people who want to improve their exercise capacity, are under high levels of stress, or are involved in intense physical training.

  • May help support a modest improvement in exercise capacity in individuals with stable cardiovascular disease (CVD)
  • Supports protein synthesis
  • Helps replenish arginine levels during times of stress
  • Used to make nitric oxide, a compound in the body that helps relax blood vessels and improve blood flow


Each vegetarian capsule contains:
L-arginine (hydrochloride) 500 mg
Other Ingredients
Vegetarian capsule (carbohydrate gum [cellulose], purified water), vegetable grade magnesium stearate (lubricant), rice powder.


4 capsules 3 times daily with meals or as directed by a health care practitioner. If you suffer from a cardiovascular disease, consult a health care practitioner for use beyond 6 weeks.

Allergy Information

Contains no artificial colours, preservatives, or sweeteners; no dairy, sugar, wheat, gluten, yeast, soy, corn, egg, fish, shellfish, animal products, salt, tree nuts, or GMOs. Suitable for vegetarians/vegans.


Do not use if you have had a myocardial infarction (heart attack). 

Always read the label for full list of cautions and warnings. Please consult a health care practitioner before use.
Keep out of reach of children.

Safety sealed with printed inner seal. Do not use if seal is broken or missing. Keep tightly closed. Store at room temperature out of direct sunlight.

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