Human Growth Hormone (HGH) is a massive protein consisting of 191 amino acids. For decades, researchers sought to isolate the specific fragment responsible for HGH's lipolytic (fat-burning) effects, without triggering the growth-promoting or diabetogenic side effects of the full hormone.

## The Discovery of Fragment 176-191

Scientists discovered that the terminal amino acids 176 through 191 of the HGH molecule are solely responsible for its effect on fat metabolism. By synthesizing just this 20-amino-acid fragment, researchers created Fragment 176-191 (also known as AOD-9604).

## Mechanism of Action in Research

In laboratory models, Fragment 176-191 has been shown to:
- **Stimulate Lipolysis:** It promotes the breakdown of triglycerides in adipose tissue, releasing free fatty acids into the bloodstream.
- **Inhibit Lipogenesis:** It prevents the conversion of dietary fats into stored body fat.

Because it lacks the growth-promoting properties of full HGH, Fragment 176-191 does not cause insulin resistance or cellular proliferation in studies, making it a highly targeted compound for metabolic and obesity research.

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*Disclaimer: Strictly for in vitro laboratory research. Not for human consumption.*