1. citrulline

noun. an amino acid that does not occur in proteins but is an intermediate in the conversion of ornithine to arginine.


  • aminoalkanoic acid

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Example sentences of the word citrulline

1. Noun, singular or mass
NIH says that the safety of citrulline is unknown, and that arginine may be safe at up to 9 grams per day for several days or weeks.

2. Adjective
Among 18 men, those that were given citrulline malate showed a significant reduction in fatigue and had an increased synthesis of energy-producing enzymes for quicker recovery after exercise.

3. Verb, base form
L-arginine can also be converted to citrulline, releasing a highly reactive and metabolically important gas called nitric oxide.

4. Verb, non-3rd person singular present
NIH explains that you can’t take an actual “nitric oxide supplement,” but you can take supplements of the amino acids arginine or citrulline.