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Amino acid derivative

Citrulline

Citrulline is an amino acid found in watermelon. The body makes it and converts it into arginine, but does not use it to build proteins.

Also listed as L-Citrulline, Stimol (Brand Name), citrulline malate, Citrulline Malate 2:1

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Can food supply citrulline?

NIH lists about 365 mg in one US cup of diced seedless watermelon. This is a food amount, not an equivalent of every supplement protocol. 1

Sources