"Vitamin D deficiency results from lack of exposure to sunlight (for example: if you live in the northern hemisphere, [cover up with clothing, or simply avoid the sun and wear sunscreen]), impaired vitamin D absorption [due to a medical condition], medications that impair vitamin D absorption, and low dietary intake," added Dr. Shainhouse.
Vitamin deficiencies that can cause dry skin include vitamins D and A. Deficiencies in niacin, iron, or zinc can also cause dry skin. Learn More: Best At-Home Micronutrient Testing 11 Sources
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vitamin d deficiency cause dry skin
