The human body requires a number of vitamins and minerals to function properly. Examples include vitamin A, which is required by the retina in the eye, vitamin D which is required for maintaining healthy bones, and vitamin E which helps form red blood cells. A diet lacking enough essential vitamins is likely to result in vitamin deficiency syndromes. Scurvy, rickets and beriberi are examples of such syndromes. Eating a healthy, balanced diet typically provides enough vitamins for the body’s needs. Some people, however, like to take multivitamins to ...

Here it is, your complimentary teaser of the latest issue of How It Works magazine. Learn about the amazing journey your food makes through your body in our feature about human digestion. Take a trip around the world's largest cruise ship, the Oasis of the Seas. Journey to the centre of the Earth with us as we discover what's inside this planet of ours....