Note: Do not tilt your head back. This may cause blood to run down the back of your throat, and you may swallow it. Use your thumb and forefinger to firmly pinch the soft part of your nose shut. The nose consists of a hard, bony part and a softer part made of cartilage.
Vitamins are classified as either fat soluble (vitamins A, D, E and K) or water soluble (vitamins B and C). This difference between the two groups is very important. It determines how each vitamin acts within the body. The fat soluble vitamins are soluble in lipids (fats).
There are two types of vitamins: water soluble and fat soluble. Water soluble vitamins include vitamins B1, B2, B3, B6, B12, vitamin C, biotin and folate. They are not stored in large amounts in the body, and any extra is lost through your urine. Fat soluble vitamins include vitamins A, D, E and K and they can be stored in your body.