Vitamin D deficiency.
I started talking to you about vitamin D3 supplementation about 5 years ago. It is everywhere now and most of you are probably taking vitamin D3 supplements. Just in case some of you have not decided I am reviewing.
The Institute of Medicine has endorsed the historical definition of vitamin D deficiency as a 25- hydroxyvitamin D level of less than 20 ng/mL, insufficiency as 21-20 ng/mL, and sufficiency as 30-100 ng/m L. I want my levels to be at or above 70 ng/mL, so I had myself tested every 6 months for over two years and found that it took me 6 months to get from 40 ng/mL which is low normal to 70 ng/ml which is where I wanted to be and I had to consume a daily minimum of 5,000 IU of D3 to keep it up at 70. Even though I am often in the sun even in the winter I have the opportunity to visit tropical areas where the sunlight is greater than my home in Ohio.
It is estimated that at least 20%, if not a large majority, of seniors in the United States are vitamin D deficient, based on the 10M definition, with a high proportion of younger adults and children also likely to be vitamin D deficient. These estimates are supported by numerous epidemiologic studies in varied populations. That is why my family supplements vitamin D3 for our infants from birth.
The principal source of vitamin D is exposure to natural sunlight. Dark skin pigmentation and sunscreens with an SPF greater than 30 reduce solar vitamin D availability dramatically.
Only a few foods are naturally rich in vitamin D, such as wild salmon, tuna and shitake mushrooms, so vitamin D supplementation is added to a variety of foods in the U.S. and Canada. Since I do not eat processed foods I supplement my own diet and the diet of my family.
Obesity is associated with reduced levels of vitamin D.
Vitamin D deficiency is a problem in patients with intestinal malabsorption, including those with bariatric surgeries. Nephrotic syndrome causes increased urinary loss of bound vitamin D.
Multiple medications including corticosteroids, antifungal, HIV drugs, and anticonvulsants may increase the risk for vitamin D deficiency.
Studies find that vitamin D deficiency increases the risk of sensitization to food allergens in infants with vitamin D deficiencies and that atopic dermatitis may be more severe in infants with vitamin D deficiency. Babies with vitamin d deficiencies are more likely to be dairy and wheat allergic. We give our nursing moms vitamin D3 and our nursing babies at about 10 days vitamin D3. Keep you and your family strong with vitamin D3.