Vitamin Products is one of our best selling. Vitamin E Active Ingredients, Vitamin K2 Powder, Vitamin B6 Powder, etc. They are usually used for Healthcare Product, Nutrition Supplements... Vitamins are a group of substances that are needed for normal cell function, growth, and development. Vitamins are grouped into two categories: Fat-soluble vitamins are stored in the body's liver, fatty tissue, and muscles. The four fat-soluble vitamins are vitamins A, D, E, and K. These vitamins are absorbed more easily by the body in the presence of dietary fat. Water-soluble vitamins are not stored in the body. The nine water-soluble vitamins are vitamin C and all the B vitamins. Any leftover or excess amounts of these leave the body through the urine. They have to be consumed on a regular basis to prevent shortages or deficiencies in the body. The exception to this is vitamin B12, which can be stored in the liver for many years. Vitamin E is an antioxidant also known as tocopherol. It helps the body form red blood cells and use vitamin K. Vitamin K is needed because without it, blood would not stick together (coagulate). Some studies suggest that it is important for bone health. Vitamin B6 is also called pyridoxine. Vitamin B6 helps form red blood cells and maintain brain function. This vitamin also plays an important role in the proteins that are part of many chemical reactions in the body. The more protein you eat the more pyridoxine your body requires.