My fasting insulin was 18.6 µIU/mL at week 0, despite A1c 5.4 and a doctor saying everything looked great. That single number changed my whole recomp.
For two years I did the classic 42M thing: lift hard, hit protein, sleep 7-8, and wonder why the waist would not move. Scale would drop 2 lb, then bounce back. Body fat barely budged.
Turned out my fasting insulin and hs-CRP were quietly high, and my liver enzymes were drifting up.
Not scary-high, just enough that my clinician wanted a recheck in 12 weeks. I did not start any peptide or GLP-1 at that point.
I just went after the boring stuff: 8k steps daily, two beers max per week, more fiber, and a real deload every 8 weeks. The weird part? My weight stalled for almost 6 weeks while my waist dropped 1.25 inches.
Bloodwork at week 16: fasting insulin down to 9.2, hs-CRP from 3.8 to 1.6, ALT back in range. That was the recomp signal, not the scale.
What rarely gets said is that labs can improve while the mirror lags, so you need a longer timeline than the 8-week before/after posts suggest. If I had judged by weight alone, I would have quit at week 4.
Now I track waist, progress photos, and quarterly labs like a nerd. Still 42. Still not 20. But the data finally argues in my favor.