Exactly! I ate strict Keto for six months, of course I lost weight, 18 kilos to be exact.
But then the misery started, my thyroid gland went on hold, and I dragged on. It turned out to be Hashimoto's.
I gained 25 kilos in 3 months, even though I was really watching my food.
Now I eat a meal with slow carbs once a day. And feel much better.