Developed by Eli Lilly under the compound code LY3437943, retatrutide simultaneously activates GLP-1, GIP, and glucagon receptors a mechanism that distinguishes it from currently approved agents such as semaglutide and tirzepatide
Luo X, Hu Y, He S, Ye Q, Lv Z, Liu J, Chen X
This distinction matters for understanding the level of evidence behind the product but doesn't affect the legality of a properly prepared and prescribed compounded medication
Unlike semaglutide and tirzepatide, where the FDA has now spent years responding to shortages, compounding, and illicit imports, many of these newer drugs are still investigational
Numerous studies have investigated the expression patterns of endogenous GLP-1 and GLP-1R in the central nervous system (CNS) and the peripheral nervous system, with a consensus that these are expressed on neurons and found in most areas of the brain and gutbrain axis 2
These effects of vitamin D3, as well as a resulting increase in GSH levels, have been functionally documented in cell culture studies (28, 29) and in human subjects (30)