Get more vitamin D
A recent study from Harvard Medical School found that children who had low levels of vitamin D, which regulates the immune system, had more evidence of allergies. If you don’t already take a vitamin D supplement, you might want to start. Multivitamins typically contain 400 international units of D, but many experts recommend that adults take 800 to 1,000 IUs per day to reap the health benefits.
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