How to you check your kids diets ?

It is true in the US I know the obesity rate among children is raising horribly. I must admit though I have very little control over what my son (15) eats. I can buy healthy food but if he doesn't want to eat it he won't and then will drive me crazy until I get him what he likes. He however has never had a weight problem as he is very very active and even when eating tends to be on the go - as he heads out the door with microwaved sandwich in one hand and skateboard in the other.

I personally do the buying of groceries for the family. I go to the public market, too, to buy meats, fish and vegetables. I allow my kids to have their share of junk foods once in a while. But, I still do the cooking at home. I am very sure that my children are having their share of the healthy foods which they must partake of. I am also giving them herbal food supplements. They are doing fine in terms of having healthy diets each day. Fruits are part of our daily food intake along with at least 2 liters of water consumption for each one of us at home. The consumption of milk and chocolate drinks are greatly reduced recently, though.