"Citrulline" is a naturally occurring free amino acid, first extracted from watermelon. It is abundant in cucurbitaceous plants. In the body, arginine and citrulline are mutually produced, and the nitric oxide generated in this process is considered beneficial for health, attracting attention. Selected 8 active ingredients: "Citrulline," "Piper Longum Extract," "Vitamin B12," "Folic Acid," "Egg Yolk Peptide," "Calcium Lactate," "Undenatured Type II Collagen," and "Devil's Claw Extract." "Citrugold" is manufactured in a domestic factory of a cooperating manufacturer that complies with GMP, which thoroughly manages all points from raw material procurement to shipment. Products are carefully inspected by human eyes and machines, and only products with confirmed safety are delivered. Take 4 tablets a day as a guide, with water or other beverages.