Retatrutide vs tirzepatide — what the receptor differences mean
Tirzepatide activates GLP-1 and GIP receptors. Retatrutide adds glucagon. That third receptor changes everything about energy expenditure, fat mobilisation, and what you need to monitor. A mechanistic breakdown.
11 min read
IGF-1 and GH interpretation — why serum GH tells you nothing
Serum GH is useless for monitoring growth hormone status. IGF-1 is the 24-hour integrated signal that actually reflects GH output. Here's how to interpret it, age-adjust it, and use it to track peptide protocols.
10 min read