There are several brands, ways to store and to inject HGH legally available and approved in the United States. However, there is only 1 type of human growth hormone injection known as Somatropin (rDNA origin). Some manufacturers offer multi-use injectable pens, single use injectable pre-loaded syringes or vials that require reconstitution.
The various manufacturers brands of HGH also differ by the dosages available in their injection kits and differ mainly by their IUs and delivery methods, in addition to ratings of quality. All of the HGH name brands produced by US based pharmacies are considered “high quality” growth hormone.