Best HGH Spray - HGH Spray Human growth hormone (HGH) is the main reason for the youthful vigor and growth in human beings. The best HGH spray on the market by far is Sytropin. Sytropin(www.sytropin.com) is made up of 8 different and effective amino acids. Simply spray the product into your mouth and experience the renewed vigor of your youth all over again.