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Vitamin D may be one of the lesser known vitamins, but it's one of the most important. Read on for the 411 on this essential mineral. Vitamin D - Why Is It Good For You? Vitamin D is important in the growth, development and maintainance of strong, healthy bones. It works with other vitamins and minerals, such as calcium, to promote bone mineralization. Without vitamin D, bones can become thin, brittle or deformed. Kids who don't get enough vitamin D are at risk of getting rickets, a disease that affects bone growth and development. Adults with vitamin D deficiencies may get osteomalacia or osteoporosis, where bones become weak and brittle. Vitamin D - What Foods Can It Be Found In? In North America, milk, margarine, butter and cereals are fortified with vitamin D, which means it's added to them during production. Vitamin D can also be found in egg yolks, cod liver oil and fatty fish, such as salmon and mackerel. However, the most important source of vitamin D is the sun. When your body is exposed to ultra-violet (UV) rays from the sun, it triggers vitamin D synthesis in the skin. Although suncreens with an SPF of 8 or greater will block UV rays that produce vitamin D, it's still important to use sunscreen to help prevent skin cancer. Vitamin D - Did U Know? - Vitamin D is commonly known as the sunshine vitamin. - Bone growth and development is the most important during your childhood and teenage years. The recommended daily intake of vitamin D for kids and teens aged nine to 18 years old is 5 micrograms, or 0.005 mg. - The need for vitamin D increases as peeps age. - By definition, a vitamin is a substance that is required by the body, but is supplied in the diet since the body can't make it. That's why vitamin D isn't technically a vitamin because it can be produced by exposing your skin to sunlight.
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Niska razina vitamina D povisuje rizik od srčanog i moždanog udara za 62 %, a rizik je još veći za osobe sa povišenim krvnim tlakom, tvrdi nova studija. Znanstvenici su pratili razinu vitamina D u uzorcima krvi preko 1 700 subjekata. U 28 % ispitanika je ta razina iznosila manja od 15 nanograma po mililitru (ng/ml). Nakon 5 godina znanstvenici su ponovili mjerenje te utvrdili da osobe sa najnižom razinom vitamina D imaju veći rizik od kardiovaskularnih bolesti. Iako se razina od 30 ng/ml smatra optimalnom imalo ju je samo 10 % ispitanika. Potrebna su daljna istraživanja koja bi potvrdila dobivene rezultate. Izvor: Circulation Kako osigurati dovoljno vitamina D? Vitamin D prisutan je u većini prehrambenih proizvoda, ali najčešće u nedovoljnim količinama. Najviše vitamina D nalazimo u ograničenom broju namirnica poput ulja iz jetre bakalara te mesa riba iz hladnih mora, lososa i haringe. Osim toga ima ga u mlijeku, mliječnim proizvodima, žutanjku, cerealijama te kvascu. Kako se radi o vitaminu topljivom u mastima, njegova apsorpcija iz crijeva usko je povezana s apsorpcijom masti te radom jetre i žuči. No, primarni izvor tog sastojka nije prehrana nego kemijska reakcija u koži, pa je najbolji način opskrbe organizma vitaminom D izlaganje kože sunčevim zrakama. Koliko će se vitamina D sintetizirati u koži ovisi o dobu dana, godišnjem dobu, geografskoj širini i pigmentaciji kože. Uglavnom 10 do 15 minuta izlaganja ruku, ramena ili lica suncu 2-3 puta tjedno, dovoljno je da se zadovolje dnevne potrebe za vitaminom D. Smatra se da se na svakih 5% površine kože izložene suncu može proizvesti 435 i.j. vitamina D .