Sources

- www.google.com

-http://www.vendingmachinesunlimited.com/

-http://teenadvice.ygoy.com/nutrition-for-teenagers-why-do-teenagers-need-nutrients/

-http://www.medicinenet.com/script/main/art.asp?articlekey=10054

-http://kidshealth.org/teen/food_fitness/nutrition/vitamins_minerals.html