Teens or parents of teens, becoming vegetarian is a big step information on how to . a #vegan or #vegetarian and want additional information about planning meals? Check out our FREE downloadable Resources on healthy meatless eating. Jun 11, - What nutrients should vegetarian teens be concerned about? Iron - choose whole grain breads and cereal, dark green leafy vegetables, dried fruit, eggs, beans, lentils, and nuts. Calcium and vitamin D - consume at least 2 cups of milk or fortified soy beverages each day.