Wednesday, December 13, 2017

A Guide to the D Vitamin

February 23, 2009 by  
Filed under Vitamins

The D vitamin is the only vitamin that is not obtained from foods that are consumed. Instead, the D vitamin is actually obtained by sunlight on the skin. There has been a lot of media coverage about the dangers of getting too much sun but it is essential that the skin is exposed to sunlight to obtain the recommended daily allowance of the D vitamin. In reality, the amount of time that a person has to spend in the sun to receive a sufficient dose of the D vitamin is extremely small and just a few minutes a day will be sufficient and not have any adverse effects from the amount of ultra-violet light received.

The most important function of the D vitamin is to help control how much calcium is absorbed from food. The majority of the calcium is used to build strong teeth and bones but it is also needed to send messages along the nerves and to help muscles, such as the heart muscles, to contract. It is the D vitamin that ensures that there is always sufficient calcium in the blood to perform these tasks. Other functions that require the D vitamin relate to the immune system and it is believed that it is also a contributing factor in reducing the risk of contracting cancer and, in particular, colon cancer.

The variant of the D vitamin that is formed under the skin is known as vitamin D3, or cholecalciferol. This D vitamin is created when the ultraviolet in the sunlight reacts with a type of cholesterol that is found under the skin naturally. The D3 is converted into a more active form of the d vitamin in the liver and is then diverted to where it is needed the most. Some of the D vitamin remains in the liver and kidneys to help reabsorb the calcium from the blood. The rest of the D vitamin is dispersed to the bones to help them retain their calcium and the intestines to aid absorption of calcium from food.

Even though the majority of the D vitamin is formed through the exposure of the skin to sunlight there are some foods like milk that do contain some of the vitamin naturally. This form of the D vitamin is known as vitamin D2, or ergocalciferol. This is used in the same way as the other D vitamins and is the type used to create the majority of D vitamin supplements.

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Comments

12 Responses to “A Guide to the D Vitamin”
  1. Peggy says:

    New research on vitamin D just came out. Here’s a link to the write-up from the Linus Pauling Institute for Micronutrient Research at Oregon State: http://lpi.oregonstate.edu/infocenter/vitamins/vitaminD/index.html#lpi_recommend

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  2. Priscilla says:

    Vitamin D is important, thanks for the info.

    Now, the next ? is: are all Vitamin D pills/capsules the same in quality?

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  3. Eden says:

    Same here.I can’t eat dairy anymore or I’ll break out.My foeherad was clear after stopping dairy consumption then I ate one small bag of cookies and I broke out all over my foeherad.Then I had a speach a few days later.I hated going out.Its now getting better since I stopped again.I started taking vitamin a supplements and it helped clear my skin too.It sucks that some people can drink and eat and smoke whatever and still have slear skin but not us.Zinc and vitamin e is suppose to help too.

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  4. sildenafil says:

    This is an article that makes you think “never thought of that!”

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  5. This design is wicked! You obviously know how to keep a reader amused. Between your wit and your videos, I was almost moved to start my own blog (well, almost…HaHa!) Great job. I really enjoyed what you had to say, and more than that, how you presented it. Too cool!

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  6. This forum needed shaking up and you’ve just done that. Great post!

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  7. I’m impressed. You’ve really raised the bar with that.

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  8. I just watched that episode and when Aaron is in a basket when Claire and Kate are hanging up clothes. You can get a clear view of Aaron’s left feet which is the same one that the statue. And you can clearly see that he got five toes just as everybody else. Sorry i really hoped that he would have four toes.

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  9. 5-8-12Daniel spune: va rog frumos cum pot sa imi aflu placa de sunet am pc intel R windows xp sp3 am incercat mulete draivare si nu a mers nik si cum faceam la celalalte pc imi nu merge aicia ce drecu sa fac +18V-a ajutat acest raspuns?

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  10. You are seriously making me jealous of my days as a frosh (which seems like a lifetime ago). you're going to have so much fun, trust me it will be better than NYFW anyway.xxxTiffany

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  11. http://www./ says:

    Passerinipresenta la documentazione scientifica che sostieni esistere, ammesso che tu sappia distinguere una documentazione scientifica dalla banale propaganda…@ sandro75kno, purtroppo penso non sia un caso, e fino a quando in Italia sarà lasciata libertà di azione a queste "camarille" più o meno accademiche, avranno buon gioco quelli che sparano ad alzo zero sull'Università in generale e sulla ricerca pubblica… discorso lungo e complesso, da non fare assolutamente qui…

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  1. […] are simply excreted and result only in a waste of money, some have some ugly consequences (read about Vitamin D). In addition, they keep coming out with more micronutrients that they’ve identified, so who […]



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