This document discusses several myths and facts related to vitamin and mineral supplements. It states that while a balanced diet is most important for getting necessary nutrients, supplements can be beneficial in some cases such as after illness or injury when the body needs extra support. However, supplements will not make you grow taller or prevent weight gain on their own. Antioxidants from foods can help prevent cell damage from free radicals, but supplements are not necessary for most children and adolescents as long as their diet is varied.