Injection was the first way that human growth hormone was administered. It was extracted from corpses and used to increase the height of small children who otherwise would have had stunted growth. People began to realize that not only did the human growth hormone help small children but the elderly as well. It was giving them a somewhat better quality of life. The HGH was helping them to be more active and they felt younger. It wasn't long after that, that the middle aged adults soon found out that they too could benefit from the human growth hormone. It was slowing down the aging process. This is the reason why we have a wave of HGH products on the market. Taking it in the pill form is the most affordable way. Unfortunately there are some side effects that may include aggression, malaise and dry mouth. There is also the possibility that it may increase the risks of diabetes. I guess it's like anything, you need to do your research and make sure it's right for you before you jump on the band wagon.