For researchers interested in the comparison between tirzepatide and next-generation compounds like retatrutide, which adds a third receptor (GCG), our guide to retatrutide versus semaglutide provides useful context, as does our three-way comparison of semaglutide, tirzepatide, and retatrutide
2024;80(2):e546
Dose-dependent increases in fasting insulin and C-peptide were observed, with maximum levels seen at 24 and 48 hours, returning to near baseline levels by Day 15
Timing the increase for the follicular phase (days 1 through 14 of the cycle) can reduce the overlap between hormonal GI effects and dose-escalation GI effects
The pharmacological form of B12 may also be relevant
Taking too much B12 can cause skin rash, diarrhea, or stomach problems