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:

• Is it safe for children to drink soy milk?
• Why don’t we have a screening test for pancreatic cancer?
• Are PET-CT scans as reliable as a mammogram for detecting breast cancer?
• Should my diabetes treatment be more aggressive given my elevated hemoglobin A1c?
• Are there risks from eating too much fish?
• How do I handle the pain and idiosyncrasies of my hammertoes?
• How do I unplug my ear?
• What conditions cause tremors in adults?
• Does ginkgo biloba help slow down dementia?

Read a full-length sample Q&A: "Is it safe for children to drink soy milk?"