Well, that's depressing, especially since parents make most of the choices for children. "Your parents fed you bad food so I guess you're screwed." Yay.
My mother was so into sugar and had other medical issues and had all her teeth pulled and dentures by 35. I was born into an extremely high insulin environment and was morbidly obese by 8.
I just hit my 4 year anniversary of carbohydrate recovery and I’ve made super significant change in my weight, cholesterol, A1C and tons of other unmeasurables.
That's mostly true for what the kid eats, but not really how much the kid eats. Childhood obesity is largely genetic, the correlation between an adoptee's BMI is stronger with that of their biological parents than with their host family.