Arginine is one of 20 amino acids?? the building blocks of protein**</br>Arginine can serve as a source of energy?? and is involved in various pathways throughout the body.**</br>Arginine supports the effect of exercise and is one of the most important amino acids involved in immune function.**</br>No Artificial Color?? Flavor or Sweetener?? No Preservatives?? No Sugar?? No Starch?? No Milk?? No Lactose?? No Soy?? No Gluten?? No Wheat?? No Yeast?? No Fish. Sodium Free.</br></br>Product Description</br></br>Puritan's Pride L-Arginine 1000mg Free form 100 capsules - Circulatory Health</br><br/>http://www.amazon.com/gp/product/B007JT17JS