What is vitamin D and why is it needed? Vitamin D is one of many nutrients our bodies need to stay healthy. Among the vitamin's main functions, it helps the body: • Absorb calcium. Vitamin D, along with calcium, helps build bones and keep bones strong and healthy. • Block the release of parathyroid hormone. This hormone reabsorbs bone tissue, which makes bones thin and brittle. Vitamin D may also play a role in muscle function and the immune system. Vitamin D3 is vitamin D3. Vitamin D helps your body absorb calcium. Vitamin D3 is used as a dietary supplement in people who do not get enough vitamin D in their diets to maintain adequate health. The immune system is your body's defense system. It helps protect it against infections and other illnesses. Taking vitamin D every day has been shown to reduce the risk of falling in older individuals. Other ways vitamin D is thought to help us, and how much we would need to take, is an area of active research (and controversy). There have been studies to suggest that it might help prevent,,. There is also some research that it might help prevent and treat, heart disease,,. However, the results of many of these studies are either preliminary or under debate. Without other long-term research, even many of the researchers who conducted these initial studies are cautious about recommending vitamin D for the prevention of these diseases. What are the sources of vitamin D? You can get vitamin D through sun exposure, your diet, and supplements. Sun exposure Vitamin D is produced when your skin is exposed to sunshine. The amount of vitamin D that your skin makes depends on such factors as the season (i.e., there's usually less sunshine in winter months), the time of day (the sun's rays are most powerful between 10 am and 3 pm), the amount of cloud cover and air pollution, and where you live (cities near the equator have higher UV levels). It's the UV (ultraviolet) light in sunlight that causes your skin to make vitamin D. ![]() Food sources (diet) The best way to get enough vitamin D every day is to eat a variety of healthy foods from all food groups. The vitamin content of various foods is shown in the table. 2 min What Is Vitamin D? Vitamin D, often referred to as the “sunshine vitamin,” is actually a fat-soluble hormone that the body can synthesize naturally. There are several forms, including two that are important to humans: D2 and D3.
Why Is Vitamin D Necessary? Vitamin D assists in the absorption of calcium and promotes bone mineralization, which may prevent or slow the progression of osteoporosis. It also helps to strengthen the immune system and protect against a number of serious diseases, including rickets and osteomalacia. Research suggests vitamin D may also provide protection from,, several autoimmune diseases (including and ), and reduce the incidence of fractured bones. In addition, growing evidence has demonstrated its important role in defending against cancer (studies link a deficiency of vitamin D to as many as 18 different cancers). What Are The Signs Of A Deficiency? Deficiencies of vitamin D are common, especially in industrialized countries in northern latitudes, where sun exposure is typically infrequent. Lawak batak terbaru meri sinaga. Low levels of vitamin D may be indicated by porous bones, weak muscles and easy fracturing. How Much Vitamin D Should Adults Take? According to the National Institutes of Health (NIH), the daily Adequate Intake (AI) for adults is 5 mcg (200 IU) daily for males, female, and pregnant/lactating women under the age of 50. People 50 to 70 years old should get 10 mcg daily (400 IU) daily, and those over 70 should get 15 mcg daily (600 IU). Based on recent research, Dr. Weil recommends 2,000 IU of vitamin D per day. Look for supplements that provide D3 (cholecalciferol) rather than D2 (ergocalciferol). Anyone with vitamin D deficiencies should discuss intake levels with his or her physician.
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