Manufactured in USA in GMP certified, FDA registered facility.
HPLC tested by an independent lab in the USA to ensure purity.
Pure Science Supplement L-Arginine 750mg x 100 capsules is a pre-cursor to nitric oxide (NO2), an important component that effects the relaxation of endothelium, which is the thin layer of cells that lines the interior surface of blood vessels and lymphatic vessels.
You get the purest L-Arginine with the Pure Grade Guarantee by Pure Science Supplements.
This product is considered stable at full potency for two years from the manufacture date.