HGH “Fragment” is the portion of HGH that is responsible for most of HGH’s fat-burning effects, but specifically omits many features contained in the full peptide. Because of this, HGH Fragment can be ran at MUCH higher dosages while allowing the user to skip out on the typical side effects of injecting excessive HGH (water retention, insulin/blood sugar issues, carpal tunnel syndrome etc).
Most users opt to mix both — a reasonable dose of full HGH coupled with an aggressive dose of HGH Fragment yield “the best of both worlds”.