XERENDIP is a man-made copy of natural growth hormone that has been used to treat people all over the world. XERENDIP is a 191 chain amino acid which is bio identical to what you produce naturally in your pituitary gland. XERENDIP is made by Pisa Lab which is a Mexican rmaceutical Company. You are allowed to travel with it back to the United States because it is approved in Mexico. Under the NAFTA free trade agreement, any medication approved in Canada, USA or Mexico is also approved for use in the other countries on that list.