Have a health question? The May 2011 issue of the Harvard Health Letter may have an answer. The fourth annual all-Q&A issue of the newsletter answers readers’ questions about everything from robotic surgery to baggy eyes to uterine fibroids. All of the answers come from doctors and faculty at Harvard Medical School or the Harvard School of Public Health.

Most issues of the Harvard Health Letter answer one or two reader questions in the "Ask the Doctor" feature. The May 2011 issue answers 11 reader questions:

• Is robotic surgery better than traditional surgery?
• Is there an alternative to warfarin?
• Do I need to wait for a cataract “ripen” before surgery?
• Can you tell me more about seborrheic keratosis?
• What can be done when the contrast agent interferes with a nuclear stress test?
• Why do noses run in cold weather?
• Is it true that we only use 10% of our brain?
• What causes puffy, baggy eyes?
• What can be done about heavy bleeding caused by uterine fibroids?
• Is coconut oil healthy?
• Do I need to take aspirin for heart disease protection?

Read a full-text version of the answer to this question from Professor Walter Willett, chair of the Department of Nutrition at the Harvard School of Public Health: "Is coconut oil healthy?"