My parents are ruining my health, please help me???!!!?

your parents behavior is typically of those that lack the self-discipline to care about eating healthy and exercising. changing the lifestyle and eating healthy takes a conscious effort, sticking to bad habits takes no effort as you don't have to do anything. there's nothing you can do to change them, most likely they have been eating like that their entire lives. all you can do is bid your time until you get old enough to move out of the house.