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The kind of sunscreen you use depends on how long you are outside and what you do during the day, according to Johns Hopkins Medicine. Mineral and chemical sunscreens work similarly.
A deficiency occurs if a person doesn't get enough vitamin D from sunlight or food, or if their body can't synthesize or absorb vitamin D properly due to an underlying condition or medication.
The only way to quantify adequate levels of vitamin D is with a serum 25(OH)D 3 (calcifediol) test. [23] In the United States, serum 25(OH)D 3 was below the recommended level for more than a third of white men in a 2005 study, with serum levels even lower in women and in most minorities.
But 5–15 minutes of casual sun exposure of hands, face and arms two to three times a week during the summer months is sufficient to keep your vitamin D levels high. Vitamin D can also be obtained from food and supplementation. [54] Excess sun exposure produces harmful effects, however. [53] Vitamin D promotes the creation of serotonin.
Pre-eclampsia: There has been an association between vitamin D deficiency and women who develop pre-eclampsia in pregnancy. The exact relationship of these conditions is not well understood. [17] Maternal vitamin D deficiency may affect the baby, causing overt bone disease from before birth and impairment of bone quality after birth. [9] [18]
There are two sources of vitamin D: Vitamin D2 comes from fortified foods and mushrooms, while vitamin D3 is produced in the skin when exposed to sunlight (which is why it’s often known as the ...