Nitric oxide supplements are a category of supplements that includes L-citrulline and L-arginine. Researchers have performed multiple clinical trials related to nitric oxide supplements and their effectiveness, often with mixed results.
The two most common nitric oxide supplements are L-arginine and L-citrulline.
L-arginine is an amino acid, or a protein building block, naturally found in red meat, dairy products, poultry, and fish. Manufacturers produce it in a laboratory as a pill, powder, or cream.
L-citrulline is also an amino acid found in meat, nuts, legumes, and watermelon. Manufacturers can also make L-citrulline in a laboratory and package it as a pill or powder.
Without taking nitric oxide supplements, a person typically consumes about 5 grams (g) of L-arginine per day, according to an article in
Some scientists believe that nitric oxide in the body relaxes or widens blood vessels. Some medications, such as Viagra harness the nitric oxide pathway to promote blood vessel widening and improve blood flow to the penis to enhance erections.
Many people think that taking nitric oxide supplements will enhance blood flow in the body to improve performance in sports, promote healing, enhance heart health, and provide many other potential benefits.
Some of the reported benefits of nitric oxide supplements include:
- enhancing weight loss
- improving lung function in those with cystic fibrosis
- treating altitude sickness
- improving recovery after major trauma or injury
- preventing the common cold
- reducing the side effects of memory loss
- healing diabetic foot ulcers
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