What foods should a teenaged male eat to reduce their bodys smell?

Body odor. It’s more of a question as to what foods to avoid which are things such as vegetables in the onion and garlic families. Please see your doctor to make sure all is well medically and then consider seeing a licensed nutritionist. Peace and good health.
It's not the food. A healthy diet is important, but it's not food that makes some teens stinky. He ought to take a shower once or twice a day, and use soap on a washcloth, and use an antiperspirant/deodorant. If he still stinks, he may need a prescription-strength antiperspirant.