I know at least three people on 20 mg of reta right now, one of them female.
I started retatrutide around September and it worked great at first with strong appetite control and easy deficits of 300-500 or even 1000 calories, dropping 21 kg from 128 kg down to 107 kg. Lately at 12 mg reta plus 1.2-1.5 mg cagrilintide it feels like nothing is happening. The satiety is gone, hunger has returned strongly, and meals no longer end on their own. I hold each dose for four weeks and usually need higher amounts than most people to feel anything. I noticed reta at 6 mg. I added tesamorelin a few weeks ago and wonder if that is getting in the way. Stats are about 170 cm, 106 kg, 38 male, 170 g protein, calories tracked and adjusted, workouts one or two times a week while caring for two young kids.