Types Of Vitamins And Their Functions Pdf
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Vitamins help your body grow and work the way it should.
Vitamins are a group of substances that are needed for normal cell function, growth, and development. There are 13 essential vitamins. This means that these vitamins are required for the body to work properly. They are:.
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Vitamins are a group of substances that are needed for normal cell function, growth, and development. There are 13 essential vitamins. This means that these vitamins are required for the body to work properly. They are:. Each of the vitamins listed below has an important job in the body.
A vitamin deficiency occurs when you do not get enough of a certain vitamin. Vitamin deficiency can cause health problems. Not eating enough fruits, vegetables, beans, lentils, whole grains and fortified dairy foods may increase your risk for health problems, including heart disease, cancer, and poor bone health osteoporosis. Many people think that if some is good, a lot is better. This is not always the case. High doses of certain vitamins can be toxic.
Ask your health care provider what is best for you. The Recommended Dietary Allowances RDAs for vitamins reflect how much of each vitamin most people should get each day. The best way to get all the daily vitamins you need is to eat a balanced diet that contains a wide variety of fruits, vegetables, fortified dairy foods, legumes dried beans , lentils, and whole grains. Dietary supplements are another way to get the vitamins you need if the food you eat is not supplying enough vitamins.
Supplements can be helpful during pregnancy and for special medical problems. Be very careful about taking large amounts of fat-soluble vitamin supplements. These include vitamins A, D, E, and K. These vitamins are stored in fat cells, and they can build up in your body and may cause harmful effects.
Mason JB. Vitamins, trace minerals, and other micronutrients. Goldman-Cecil Medicine. Philadelphia, PA: Elsevier Saunders; chap Salwen MJ.
Vitamins and trace elements. St Louis, MO: Elsevier; chap Editorial team. 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. There are nine water-soluble vitamins.
They are not stored in the body. Any leftover water-soluble vitamins leave the body through the urine. Although, the body keeps a small reserve of these vitamins, they have to be taken on a regular basis to prevent shortage in the body.
Vitamin B12 is the only water-soluble vitamin that can be stored in the liver for many years. Vitamin A helps form and maintain healthy teeth, bones, soft tissue, mucous membranes, and skin.
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. Vitamin B12 , like the other B vitamins, is important for metabolism. It also helps form red blood cells and maintain the central nervous system.
Vitamin C , also called ascorbic acid, is an antioxidant that promotes healthy teeth and gums. It helps the body absorb iron and maintain healthy tissue. It is also essential for wound healing. Vitamin D is also known as the "sunshine vitamin," since it is made by the body after being in the sun. Ten to 15 minutes of sunshine 3 times a week is enough to produce the body's requirement of vitamin D for most people at most latitudes.
People who do not live in sunny places may not make enough vitamin D. It is very hard to get enough vitamin D from food sources alone. Vitamin D helps the body absorb calcium. You need calcium for the normal development and maintenance of healthy teeth and bones. It also helps maintain proper blood levels of calcium and phosphorus. 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. Biotin is essential for the metabolism of proteins and carbohydrates, and in the production of hormones and cholesterol. Niacin is a B vitamin that helps maintain healthy skin and nerves. It also has cholesterol-lowering effects at higher doses.
Folate works with vitamin B12 to help form red blood cells. It is needed for the production of DNA, which controls tissue growth and cell function. Any woman who is pregnant should be sure to get enough folate.
Low levels of folate are linked to birth defects such as spina bifida. Many foods are now fortified with folic acid. Pantothenic acid is essential for the metabolism of food. It also plays a role in the production of hormones and cholesterol. Riboflavin vitamin B2 works with the other B vitamins. It is important for body growth and the production of red blood cells. Thiamine vitamin B1 helps the body cells change carbohydrates into energy. Getting enough carbohydrates is very important during pregnancy and breastfeeding.
It is also essential for heart function and healthy nerve cells. Choline helps in normal functioning of the brain and nervous system. Lack of choline can cause swelling in liver. Carnitine helps the body to change fatty acids into energy. The RDA for vitamins may be used as goals for each person. How much of each vitamin you need depends on your age and sex. Other factors, such as pregnancy and your health conditions, are also important. Fruits and vegetables. Vitamins Read more.
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Vitamin , any of several organic substances that are necessary in small quantities for normal health and growth in higher forms of animal life. Vitamins are distinct in several ways from other biologically important compounds such as protein s, carbohydrate s, and lipid s. Although these latter substances also are indispensable for proper bodily functions, almost all of them can be synthesized by animals in adequate quantities. Vitamins, on the other hand, generally cannot be synthesized in amounts sufficient to meet bodily needs and therefore must be obtained from the diet or from some synthetic source. For this reason, vitamins are called essential nutrients.
We include products we think are useful for our readers. If you buy through links on this page, we may earn a small commission. Fat-soluble vitamins are vitamins A, D, E, and K. They are present in foods containing fats. The body absorbs these vitamins as it does dietary fats. They do not dissolve in water.
Vitamin C and its supplements have marked effect on reducing the risks of cancer, cardiac and respiratory diseases. Vitamin deficiency can cause health problems. So it should be taken in required quantities through other sources such as the food we take, vitamin capsules etc. Functions of Vitamins. Based on their role in biological processes and their effect different vitamins have different functions, their function can be best understood by knowing about their deficiency diseases. The tables below list the vitamins, what they do in the body their functions , and their sources in food.
Definitions of Health Terms: Vitamins
The tables below list the vitamins , what they do in the body their functions , and their sources in food. Water-soluble vitamins travel freely through the body, and excess amounts usually are excreted by the kidneys. The body needs water-soluble vitamins in frequent, small doses. These vitamins are not as likely as fat-soluble vitamins to reach toxic levels. But niacin, vitamin B6, folate, choline, and vitamin C have upper consumption limits.
If you're like most kids, you've probably heard at least one parent say, "Don't forget to take your vitamin! Vitamins and minerals are substances that are found in foods we eat. Your body needs them to work properly, so you grow and develop just like you should.
Most people, apart from vegans, have a three to five year supply in their bodies. Vitamin B1 Thiamin It helps your body turn food into energy.