2) (2): The presence of the NAD-GDH enzyme was initially described with an unclear role in glutamate metabolism [2]
Sermorelin's FDA Journey: Approved, Discontinued, and Compounded Sermorelin acetate (Geref) was FDA-approved in 1997 for pediatric GHD 1 and in 1990 for diagnostic use.26 The manufacturer discontinued Geref in 2008 due to "manufacturing difficulties," not safety or efficacy concerns.12 In 2013, the FDA confirmed it wasn't withdrawn for safety/effectiveness, allowing for potential generic approvals.12 Currently, Sermorelin is primarily available as a compounded medication 3, which is permitted but not individually FDA-approved like mass-produced drugs.22 5.2
It is thought to primarily interact with melanocortin 1 receptors (MC1R), which are expressed in melanocytes and considered central to pigmentation processes
In 2015, Abdel-Khalek et al
How long the effects last varies by individual
The catch is that natural GLP-1 disappears quickly, breaking down within minutes