Most likely, McGuire says, BPC-157 does several things simultaneously
If the issue was genuine non-response to GLP-1 agonism, the dual mechanism of tirzepatide might provide the additional GIP-receptor activation needed for results
Some users run BPC-157 23 times per year for joint maintenance
Muscle preservation during weight loss depends primarily on protein intake (typically 1.2 to 1.6 grams per kilogram body weight), resistance training, and the rate of weight loss
(4) Heike Stier, Evert Vos, David Kenley (2013) Safety and Tolerability of the Hexadecapeptide AOD9604 in Humans Journal of Endocrinology and Metabolism, 2013, Volume 3 (Issue 1-2), Pages 7-15
The proposed chain of effects looks like this: NNMT inhibited nicotinamide is no longer inactivated by methylation and becomes available for conversion to NAD+