Harvard doctors answer intriguing questions from readers in the May Harvard Health Letter

This month, the Harvard Health Letter presents its second annual all-Q&A issue, in which Harvard Medical School doctors answer readers' questions. This is a departure from the regular issues, which feature just one or two questions from readers that are answered by members of the Harvard Health Letter's editorial board—and occasionally other Harvard-affiliated doctors—in the newsletter's back-page "By the Way, Doctor" feature. No matter what the topic, these Q&As are among the best-read articles in the newsletter. The questions addressed in the May issue reflect a broad range of interests, ranging from diabetes treatment to a recent study of ginkgo biloba for prevention of dementia. The issue answers the following questions:
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