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SUNLIGHT IS GENERALLY SUFFICIENT. "Although the amount of vitamin D adults get from their diet is often less than what's recommended, exposure to sunlight can make up for the difference." Except if obese, taking drugs that interfere, or with other medical conditions. http://www.mayoclinic.org/healthy-living/nutrition-and-healthy-eating/expert-answers/vitamin-d-deficiency/faq-20058397 View in LinkedIn

HOW DID THIS HAPPEN? The new 'crisis' in hypovitaminosis D is sudden and curious. How has it been overlooked by the medical and research community for so long, or is it a new food supplement fad? On searching for an answer, it has not been forthcoming. It is not a lifestyle disease of the spoiled West, but occurring worldwide. The answer remains illusive. View in LinkedIn

WORLDWIDE DEFICIENCY. "Worldwide, an estimated 1 billion people have inadequate levels of vitamin D in their blood, and deficiencies can be found in all ethnicities and age groups. Indeed, in industrialized countries, doctors are even seeing the resurgence of rickets, the bone-weakening disease that had been largely eradicated through vitamin D fortification." https://lnkd.in/ednKz9W View in LinkedIn

CAUSES OF THE VITAMIN D EPIDEMIC? An engineer's interesting viewpoint. "20 of the 35 reasons for Vitamin D deficiency are new." These include sun avoiding behaviors from various causes. Less cholesterol in food, obesity, increased soft drink consumption (fructose), drugs that interfere with vitamin D. And more. https://lnkd.in/eHHnpna View in LinkedIn

METABOLIC CROSSROADS. "Vitamin D3 is believed to play a role in controlling the immune system (possibly reducing one’s risk of cancers and autoimmune diseases), increasing neuromuscular function and improving mood, protecting the brain against toxic chemicals, and potentially reducing pain." https://lnkd.in/eCK43Ue View in LinkedIn

IMPORTANT MOLECULE. "Vitamin D3 deficiency can result in obesity, diabetes, hypertension, depression, fibromyalgia, chronic fatigue syndrome, osteoporosis and neuro-degenerative diseases including Alzheimer’s disease ... vitamin D deficiency plays a role in causing seventeen varieties of different cancers as well as heart disease, stroke, autoimmune diseases, birth defects, and periodontal disease." https://lnkd.in/eCK43Ue View in LinkedIn

WRONG RDA FOR VITAMIN D. "The Recommended Dietary Allowance (RDA) for vitamin D is ten times lower than what we actually need, say two teams of researchers who have challenged the US's National Academy of Sciences (NAS) and the Institute of Medicine (IOM), both responsible for the RDA." https://lnkd.in/eUCYVjB View in LinkedIn

HUMAN PHOTOSYNTHESIS. "Solar ultraviolet B photons are absorbed by 7-dehydrocholesterol in the skin, leading to its transformation to previtamin D3, which is rapidly converted to vitamin D3. Season, latitude, time of day, skin pigmentation, aging, sunscreen use, and glass all influence the cutaneous production of vitamin D3." https://lnkd.in/eJwebrk View in LinkedIn

SURPRISING DATA. "Even in the sunniest places, such as Saudi Arabia and Australia, 30% to 50% of adults and children have deficient or insufficient levels of vitamin D. At the latitude of Edmonton, Alta, 90% of children have deficient or insufficient levels." http://www.cfp.ca/content/57/1/16.full View in LinkedIn

TOO MUCH D. "Vitamin D 1000 μg (40,000 IU)/day causes toxicity within 1 to 4 mo in infants. In adults, taking 1250 μg (50,000 IU)/day for several months can cause toxicity. Vitamin D toxicity can occur iatrogenically when hypoparathyroidism is treated too aggressively." https://lnkd.in/eDUgFEU View in LinkedIn