La vitamina D è conosciuta come la vitamina the sun, because you get a lot of our vitamin D from the sun. Over the past two decades, studies have found that the level of vitamin D has decreased dramatically in the U.S., this is probably because we were told to stay out of the sun or use sunscreen.
There's a new enthusiasm with vitamin D studies showing that it does stimulate the immune system and fight viral infections such as influenza and at the same time mitigates the immune system to overwork, which can create more than mucus and fluid in the lungs, causing further problems such as pneumonia. Michael Holick, a professor of medicine, physiology and biophysics at Boston University School of Medicine, ha dichiarato: "Che cosa ha veramente vitamina D è un ruolo sentinella." Ciò significa che la vitamina D viene utilizzata dal sistema immunitario per combattere le infezioni e aiuta anche a controllare la risposta immunitaria e l'infiammazione limiti. Con il termine "tempera" il sistema immunitario in questo modo, mantiene il sistema immunitario letteralmente da superlavoro, che può effettivamente portare alla morte ed è sospettato in molti dei decessi nella pandemia influenzale del 1918.
I ricercatori della Harvard Medical School hanno condotto uno studio tra il 1988 e il 1994 con 19.000 persone dai 12 anni, con un'età media di 39, e ha trovato un legame tra bassi livelli di vitamina D and upper respiratory infections. Those with low blood levels of vitamin D were 55% more likely to get a cold, flu or upper respiratory tract infection.
Vitamin D signals the intestines to absorb calcium. With low levels of vitamin D, your body breaks down bone to get the calcium they need. Without enough vitamin D, the body can not absorb enough calcium to meet the needs of the body for football, no matter how much calcium you consume in food or supplements. The proper use of calcium is needed for the functioning of the nervous system, bone growth and bone density. The increase in vitamin D may help prevent non-vertebral fractures and reduce the risk of osteoporosis. A link was also found between low levels of vitamin D and certain cancers.
New studies have shown that vitamin D may be protective against colon, prostate, breast and other cancers. There is also evidence that vitamin D may play a role in the prevention and treatment of diabetes type I and type II, hypertension, glucose intolerance, multiple sclerosis, autoimmune diseases, schizophrenia and other medical conditions. Two small studies have suggested that vitamin D3 supplement benefits provided by people with active tuberculosis. In 2007, an analysis of 18 several randomized trials found that supplementation of vitamin D could also help people live longer.
Researchers at the University of Pennsylvania have discovered that vitamin D may slow the decline in the ability to breath in people with asthma and COPD. The researchers believe that this slowdown gradual decline, may prevent or delay the irreversible decline that leaves many asthmatic breathing even more vulnerable when they suffer an asthma attack.
Since there are many foods rich enough Vitamin D, the sun is our only source for vitamin D. We were told to stay out of the sun or use sunscreen, sunscreen and does an effective job of blocking vitamin D. During the autumn and winter months, do not get much, if necessary, vitamin D from the sun, and most of us are not even 400 IU from our diet, since foods that simply are not enough vitamin D in their . To get only the minimum required RDA-400 IU per day, which was to drink 1 liter of milk or eat 5 grams of salmon or a 6-ounce tuna. The milk has no vitamin D in it, of course, is fortified with it in the United States.
There are two types of vitamin D: one is D2 (ergocalciferol) and l'altra è D3 (colecalciferolo). La vitamina D3 è la più potente delle due. Quando si guarda a multivitaminici o integratori, cerca per la vitamina D3. L'etichetta dovrebbe dire e D3 o colecalciferolo. Un buon multivitaminico dovrebbe avere 700-800 UI di D3. La vitamina D è una vitamina liposolubile, quando lo prendi è necessario avere anche qualcosa di grasso in esso, un cucchiaino di burro di arachidi, per esempio. Molti sono raccomandando che la quantità di vitamina D3 deve essere aumentato a 2.000 UI (50 mcg) in autunno e in inverno per gli adulti sani e 1.000 UI (25 mcg) per gli adolescenti. Gli alimenti con più vitamina D sono l'olio di fegato di merluzzo, olio di pesce e latte fortificato.
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