High quality pharmaceutical grade</br>Contains 20% more pure L-Arginine as compared to L-Arginine HCL products</br></br>Product Description</br></br>Pharmaceutical Grade. Bestvite's L-Arginine is in free form for better activitity. L-Arginine is body's important building block for protein synthesis to build muscle mass.</br><br/>http://www.amazon.com/gp/product/B007G435ZU