L-Arginine is an amino acid that the body can partly produce itself, but it is also obtained from food. It naturally occurs in protein-rich foods such as meat, fish, dairy, and nuts. In supplement form, it is often used by athletes.

Yes, L-arginine can often be combined with other supplements like creatine or protein supplements. Consult a doctor for personalized advice, especially if you are taking medications.

Protein-rich foods can interfere with the absorption of arginine. This is because other amino acids use the same transport mechanisms in the gut, which can reduce the absorption of arginine. Taking it on an empty stomach optimizes absorption.