$1,100 out of pocket at week 4 is the number that still stings, and it had nothing to do with the tirzepatide itself—my insurance decided the PA wasn't medically necessary after covering the first fill. I'd been tracking everything in a Google Sheet like the OP: daily weight, weekly waist, DEXA at week 0 and 12, squat/bench/deadlift numbers, and every lab.
At week 12 I was down 17.2 lb on the scale, 5.1 inches off my waist, and my A1c went from 5.9 to 5.4, but the appeal got approved because of a two-sentence note about hypertension, not because of my spreadsheet. That was a weird gut punch.
I'd spent hours color-coding lifts and lipid panels, and the thing that moved the needle was a checkbox.
The part that rarely gets said out loud: the stress of the insurance fight tanked my recovery for two weeks, and my bench dropped 15 lb while my calories were fine. Now I keep tracking, but I also keep a one-page summary for prior auth battles: dates, weights, waist, A1c, and the specific diagnoses they care about.
If you're in the U.S., build that file early.
The body comp data is motivating, but the paperwork is the real side quest.