Vitamins are essential substances that our body needs in order to grow, develop normally and maintain its functions. This video covers vitamins A, B, C and D and their functions in the human body, ways where we can obtain them in our diet and the health outcomes when there is a deficiency in our body. This video was created by McMaster University Soheil El-azzouni, Stanley Chen, Sara Halawa, Yuxin (Tiffany) Tian and Kimberly Young.Copyright McMaster University 2014