In that regard, this Sytropin HGH Oral spray is something that may be useful since it is handy. As a supplement it is meant to increase your HGH levels. HGH stands for Human Growth Hormones and it is responsible for making the brain generate new cells to replace old ones. As we hit our forties HGH decreases its work and therefore, we have less cellular regeneration. Sytropin HGH Oral Spray hopes to increase our HGH levels so that we can feel younger.