The Book of PeptidesThe Book of PeptidesTirzepatide or Retatrutide + Tesamorelin
A persistent stacking question of the GLP-1 era: whether adding a growth-hormone secretagogue to tirzepatide or retatrutide blunts the lean-mass loss that comes with the weight loss. Trial data establishes the magnitude of that loss, not a drug-specific excess; the rest is untested community theory.
The GLP-1 drives the deficit and the fat loss; the GH leg raises nightly GH pulses and IGF-1, which in theory signals the body to hold muscle.
+2 more compounds in the full protocol
The published per-compound doses, timing, cycle length, the mechanism sources give for why it's combined, and the harm-reduction notes — the parts that took the most research to get right — are part of membership.