Nothing precise really, but I would say a lot of sugar (candy and soda) would be bad. Vegetables would be good. Avoiding fast foods and sugar will go a long way

Nothing precise really, but I would say a lot of sugar (candy and soda) would be bad. Vegetables would be good. Avoiding fast foods and sugar will go a long way I'd say. But other than that I'm really not sure, there are a lot of different (often conflicting) ideas of what is "good" and what is "bad". Fat is bad vs Fat is good. Calories matter, the rest don't vs Calories are different. etc.