Vitamins: How do they work and picking the correct one Vitamins are an essential organic compound needed that the human body needs and can get from food since the body doesn’t produce it or produces very little.   There are currently 13 vitamins which are recognized and they can either be fat-soluble (Vitamins A, D, E, K) or water soluble vitamins (Vitamin C and all B vitamins)
  1. Fat- soluble vitamins - These vitamins can stay in the body for days and sometimes months. 
  2. Water- soluble vitamins - These vitamins do not stay in the body for long and cannot be stored. People need more of a regular supply of these vitamins.