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Opinion

Dietary sources of vitamin D, not sun, advised by AAD

YOUR DOSE OF MEDICINE - Charles C. Chante MD - The Philippine Star

The American Academy of Dermatology still recommends vitamin D coming from healthy diet and supplements, not from unprotected skin exposure to ultraviolet radiation, according to a position statement.

The update comes in response to the Institute of Medicine’s (IOM) recent review of existing data on possible roles for vitamin D status in certain types of cancers, and neurologic, infectious, autoimmune, and cardiovascular diseases. In the report, the IOM called existing evidence inconsistent, inconclusive as to causality, and insufficient to inform nutritional requirement. However, the organization found that evidence does support a role for vitamin D in bone health.

The IOM’s review of the scientific evidence about vitamin D supports the academy’s long-standing recommendation on safe ways to get this important vitamin — through a healthy diet which incorporates foods naturally rich in vitamin D, vitamin D-fortified foods and beverages, and vitamin D supplements.

The statement also includes new IOM Recommended Dietary Allowances (RDA) for calcium and vitamin D intake. Of note, these age-based values were derived assuming minimal or no sun exposure, given inconsistent contributions of sunlight to vitamin D in the population and also because of the risk of cancer associated with sun exposure.

Adequate vitamin D was defined by the IOM as blood levels of at least 20 ng/mL as measured in the United States (50 nmol/L as measured in Canada).

Physicians should discuss options for obtaining sufficient dietary supplementary sources of vitamin D with patients having concerns about their vitamin D levels.

ACADEMY

AMERICAN ACADEMY OF DERMATOLOGY

DIET

EVIDENCE

EXPOSURE

INSTITUTE OF MEDICINE

IOM

RECOMMENDED DIETARY ALLOWANCES

UNITED STATES

VITAMIN

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