יעילות ורעילות של תוספי תזונה

http://www.mayoclinic.com/health/dietary-supplements/MY01408 http://blog.sierratradingpost.com/health-exercise-workout-fitness-tips-tips/do-your-dietary-supplements-cause-cancer/ http://www5.cancer.org/docroot/ETO/content/ETO_5_3x_How_to_Know_What_Is_Safe_Choosing_and_Using_Dietary_Supplements.asp

http://www.cancerhelp.org.uk/about-cancer/treatment/complementary-alternative/about/harm/the-safety-of-vitamins-and-diet-supplements?view=PrinterFriendly

http://www.skepdic.com/vitacon.html