Hi @tisme , I gained 6 kgs with tamoxifen over a 2 yr period. I did eat a bit more in that time. I was diagnosed in lockdown so I blame some of the weight gain on covid, but the side effects of tamoxifen fatigue on me really slowed me down and eventually I changed to Letrozole.
I got to the point of totally frustration with the weight thing. I am 60 yrs old. I use to get low carb in my 30s, not because of weight but I noticed cares bloated me and I didn't feel good if I ate alot of cards.
So recently I thought I would give it a go and I have almost taken off those kilos I have gained. Just a couple more to go. My GP thinks gluten adds to my inflammation and bloating and weight. By having a low carbon diet I have noticed my inflammation and bloating is gone and my energy has increased which is great for exercise.
I calorie count, I have a fitbit and I record what I eat. I make sure the calories in are less than the energy I burn or calories out. And I watch the carbs aren't high. It is working for me.
I am not saying you have to do this but maybe find what it is that increases your weight and go with that. Best wishes