How much heavier are you now then when you recovered from your eating disorder (“being underweight?”) and how long ago was it? I will share my experience but want to urge a lot of caution.
I also had an eating disorder(under eating and When I was pretending I was functional I moved into orthorexia). I took mounjaro more recently, about 5 years after I truly recovered and had been happy with my higher weight. I took the mounjaro as I had gained 11kg from steroids for endometriosis and IVF, rapid weight gain over just 10 weeks, it was wild. I then had a miscarriage and had a gap before I could try again (more of the same treatment which made me balloon before) and I took mounjaro in this gap. My IVF clinic only requires you to stop mounjaro a month before you start treatment so I had a defined window when I would have to stop using mounjaro. I lost 9 of the 11kg in about 9 weeks. I also find it hard to diet having struggled in the past and I’m looking at more rounds of this treatment (for god knows how long). My GP said she had seen women gain about 8-10kg going through the same medical treatment protocol as me so my weight gain wasn’t unexpected. It took my BMI up to 26.8, none of my clothes fit me, I felt rubbish on top of horrible miscarriage hormone crash etc.
I want to add a major qualifier to this though. I had truly recovered from my eating disorder and been at a stable higher weight point (a good 18kg heavier than I was) for 5 years. There’s a point you have to reach where you have to accept a healthier and happier weight for you is higher than you might like it to be. I’m not sure what you were at your lowest and how that compares to your 10lb gain. A BMI of 24.6 isn’t high at all. And remember BMI is a crude tool. There’s a weight our bodies all sit comfortably at - a set point - and it can be very hard to keep it below that without extreme measures. If these 10lbs keep going back on, it might be this is your set point your body likes and you’re fighting a losing battle constantly trying to lose it.
One of the things that really helped me accept my body at a larger size was weight training. It really can change your shape. And it made me care less about the scale weight and also see how being “bigger” could actually look more attractive and healthy. If you don’t like your shape, it can help and it’s one of the best things you can do for your long term health too. That would be better as an approach for maintaining a shape you like and your health too long term, rather than needing mounjaro to keep off these 10lbs.
I think I felt safer taking mounjaro too because I had a hard stop date as I had only a limited amount of time before I needed to start treatment again. I do think without a reason to stop it could be a real slippery slope. I would seriously give pause and think about that in your case.
One difference between an eating disorder weight loss and GLP-1 is that the injections make it easy to lose weight, whereas for me a lot of the eating disorder was a distraction from what was going on in my life. It took up so much time and thought, because it was so difficult actually to live my life in that way so it was a very effective mental distraction. Mounjaro stops all food noise and makes it easy to lose weight, so my eating disorder wouldn’t have been able to serve its function.
I do think it can be a slippery slope too with body dysmoprhia. Everyone with an eating disorder doesn’t see themselves with reliable eyes and is prone to body dysmorphia. I had an eating disorder age 12-18 and I relapsed aged 27 which was triggered by a sudden weight loss. I had been in hospital with a gut infection and then had a toxic liver injury from the medication for it. That weight loss just turned on the light bulb in my head again around eating disorders and I had a lot of stress in my life at that time, my own health and family. But the sudden weight loss really made me think “gosh I was fat before and didn’t even know it” (I look at those photos now with completely different eyes). I then couldn’t see how thin I was getting. My worry would be you wouldn’t be able to see the weight loss and wouldn’t be able to stop.
honestly for “this 10lbs” I would try weight training rather than mounjaro. You will likely tone up, improve your health and it will rehabilitate your relationship with your body and stop worrying about the scale number. The other thing about weight training is you can’t build muscle and get the results you want if you are under eating. It helps you see food as fuel and prioritise what your body needs. I assume you really fought to stop the worst of the restriction and you don’t want to find yourself back in the middle of it from a jolly into mounjaro.
Good luck xx