Pure® Encapsulations L-Arginine is a dietary supplement that provides an extra amount of the amino acid arginine. The L-arginine HCl contained in this product comes from the fermentation of soy and other plant sources and has been ultrafiltered and highly purified. Add an extra dose of L-arginine before exercising. Directions: For those who want to add an extra amount of the amino acid L-arginine to their diet. How to use: Take 2 capsules once a day, between meals. Caution: If you are pregnant, breastfeeding, have any health conditions, or are taking any medications, consult your healthcare professional before using this supplement. Conservation: Store in a cool, dry place.