Most evidence comes from small trials or case reports
The use of five mice per group reflected a balance between experimental control and data reliability under highly standardized conditions, including same-cage housing, age- and sex-matching, and a single experimenter
Even prior to the crackdown on compounded medications, there was a robust online ecosystem of unlicensed pharmacies selling counterfeit drugs or research-grade ingredients meant to be used in a lab rather than taken by humansand as compounded semaglutide and tirzepatide get harder to find, people who were previously taking legal copycats are considering more extreme options
Most of the well-known in-vitro literature concerns the copper-bound form, which is why research material is typically characterized as GHK-Cu with defined stoichiometry
On December 22, 2025, the FDA approved the first oral GLP-1 medication for obesity treatment , the Wegovy pill developed by Novo Nordisk
There simply hasnt been enough time to gather the kind of comprehensive, multi-generational pregnancy outcome data that exists for older medications
