
I can't think of anything more fun or healthy then spending the day in the sun. That's why I suppose the 3 places I've chose to live in my life have been Arizona, Southern California, and The Virgin Islands in the Caribbean. I probably have enough stored vitamin D in my fat cells to last a lifetime. For those of you however who have to suffer a rainy sunless climate or months of sunless cold winters increasing your uptake of vitamin D can change your life. The best place to get vitamin D is from your skin being exposed to the UV-B rays that are in normal sunlight. Vitamin D from sunlight acts as a pro-hormone, which converts into 25-hydroxyvitamin D, or vitamin D3 in your body. The photosynthesis of vitamin D, evolved over 750 million years ago, vitamin D played a critical role in the maintenance of a calcified skeleton in vertebrates, while they left their calcium-rich ocean environment for land over an estimated 350 million years ago. Vitamin D can be synthesized only via a photochemical process, so early vertebrates that ventured onto land either had to ingest foods that contained vitamin D or had to be exposed to sunlight to photosynthesize vitamin D in their skin to satisfy their body's vitamin D requirement. In 1923, Dr. Harry Steenbock established that when 7-dehydrocholesterol is irradiated with light, a form of a fat-soluble vitamin is produced known as D3.
At the University of Wisconsin, biochemist Dr.Harry Steenbock demonstrated that irradiation by ultraviolet light increased the vitamin D content of foods and other organic materials. Using $300 of his own money, Steenbock patented his invention. His irradiation technique was used for foods like milk. A vitamin D deficiency is a known cause of rickets. Rickets is a softening of bones in children. By the expiration of his patent in 1945, rickets had been all but eliminated in the US. Vitamin D3 is made in the skin, when it reacts with ultraviolet sun light. The optimal level of absorption occurs daily within the tropics, daily during the spring and summer seasons in temperate regions, and almost never within the arctic circles. Vitamin D deficiency can result in lower bone mineral density and an increased risk of bone loss (osteoporosis) or bone fracture, because a lack of vitamin D alters mineral metabolism in the body.
Vitamin D is unique also, because it functions as a prohormone. Vitamin D appears to have effects on our immune function. It has been postulated to play a role in spread of influenza. With the lack of vitamin D synthesis in the cold winter regions as one explanation for high rates of influenza infection during the winter. Low levels of vitamin D appear to be a risk factor for tuberculosis also, and historically, it was used as a treatment. Adequate vitamin D may also be associated with healthy hair follicle growth cycles, here are some good common dietary sources of vitamin D:
- Catfish, 85 g (3 oz) provides 425 IU
- Salmon, 100 g (3.5 oz) provides 360 IU
- Mackerel, 100 g (3.5 oz), provides 345 IU
- Sardines, in oil, 50 g (1.75 oz), provides 250 IU
- Tuna, canned in oil, 100 g (3.5 oz), provides 235 IU
- A large egg 60 g provides 20 IU
- Beef, 100 g (3.5 oz), provides 15 IU
- Mollusks, oysters etc. per 1/2 doz. provides 941 IU
- Cows milk, 8oz glass provides 241IU
- Mushrooms, 1oz. white provides 164IU
- Butter, 100g (3.5 oz) provides 60 IU 60 IU of Vitamin D per 100g.
Read more at http://www.dietandfitnesstoday.com/vitamin-d-in-butter.php#ybbqGrf8Lyc1d0Jx.99
60 IU of Vitamin D per 100g.
Read more at http://www.dietandfitnesstoday.com/vitamin-d-in-butter.php#ybbqGrf8Lyc1d0Jx.99
Read more at http://www.dietandfitnesstoday.com/vitamin-d-in-butter.php#ybbqGrf8Lyc1d0Jx.99



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