Eating a healthy,balanced diet provides nutrients to your body.These nutrients give you energy and keep your heart beating,your brain active,and your muscles working.Nutrients also help build and stre...Eating a healthy, balanced diet providesnutrients to your body. These nutrients give you energy and keep your heartbeating, your brain active, and your muscles working. Junk food is not one of the things people eatto be healthy. Eating junk food affects your body and can make you sick.