Raising kids #4- raising kids and weight loss

Over the years, I've had to figure out ways to cook for children and cook for me.  My body does not do well with macaroni and cheese all the time.  That is a food that children like to eat.  In fact my children like lots of foods I like but should not eat.  What do you do if  your children will only eat foods that are not good for your body?  That is a dilemma I've dealt with for 26 years.