Up to 30-40% of the weight you lose on a GLP-1 can come from lean mass, not fat.
The medication suppresses your appetite but it has no idea what your body is burning. That part's on you.
The fix? Protein, protein, protein! At least 20–30 grams in a single sitting, a few times a day, to actually hold onto your muscle while the weight comes off.
And the problem nobody really talks about?
When you're on a GLP-1, you might eat one, little slice of pizza and be completely done. Full. Finished. That one slice has maybe 5 or 6 grams of protein and a bunch of carbs.
You're eating so little that unless every single bite is protein-dense, you end up nowhere near your target. The muscle quietly keeps disappearing even as the scale goes down.
I was hitting maybe 40-50 grams a day when I needed 80+ just to stop losing it.