The standard protocol starts at 1mg weekly for 4 weeks, then titrates up monthly: 2mg, 4mg, 8mg, reaching 12mg maintenance
--- ## Step-by-Step Reconstitution Instructions ### Step 1: Gather and Inspect Check the retatrutide vial for the intact lyophilized cake (white, porous solid)
Serum-free medium was added containing 5 mmol/l glucose and 0.1% (wt/vol.) BSA with or without metformin (1 mmol/l) and cells were incubated at 37C for 24 h prior to assessment of insulin secretion as described previously [21]
As of May 2026, retatrutide is not FDA-approved, not commercially available, and not legally available through ordinary prescribing, telehealth, retail pharmacy, compounding pharmacy, or direct-to-consumer purchase