My aunt and uncle would only very rarely allow my cousins to have sugary foods, though it was treated largely a form of abuse. My aunt and uncle were morbidly obese junk food junkies, their house was always full of candy, cakes, donuts, little debbie snacks, pudding, icecream, you name it, they had it, but my cousins weren’t allowed to have any except in very rare instances. They’d take the kids out to trick or treat, my cousins would come back home with a giant bag of candy, but they’d only be allowed to have 1 piece each – my aunt and uncle got the rest. One time my aunt asked the family to make homemade milkshakes for her birthday, but then insisted my cousins could not have any.

Growing up, the cousins maintained a healthy weight and honestly other than the fact that we’d sneak them sweet snacks whenever we could, they didn’t seem to have a particularly problematic issue with food.

However, they both put on an enormous amount of weight once they left home for college. Last I saw, which has admittedly been awhile (pre-covid), they were both morbidly obese.

Granted, I’m in the USA, so even folks who were normal weight as kids and didn’t grow up in abusive homes or have restrictive diets end up becoming obese / morbidly obese from poor diets and overeating as adults.