The expert: Paula A. Johnson, MD, chief of the division of Women's Health at Brigham and Women's Hospital
The pick: "I really like WomensHealth.gov, a website of the U.S. Department of Health and Human Services. It's broad, with a lot of factual information, but it also has a lot of vetted links. Unlike many other sites, it will steer you to trustworthy places. Think of it as a gateway to the best cancer resources on the Web."
The issue: Menopause
The expert: Susan Love, MD, president of the Dr. Susan Love Research Foundation and author of Dr. Susan Love's Menopause & Hormone Book
The pick: "For support and community, I have always liked Power-Surge.com. The message boards tend to be good, and the site does a better job of describing women's experiences than anything else out there. I caution people, though, that the site uncritically recommends bioidentical hormones even though the safety data doesn't exist yet."
The issue: Pediatric health
The expert: Harvey Karp, MD, author of The Happiest Toddler on the Block and a professor of pediatrics at the University of Southern California School of Medicine
The pick: "HealthyChildren.org was just launched by the American Academy of Pediatrics. This is a well-developed health-oriented site that's there to give you advice on raising your child and also to calm your mind about medical concerns. It talks directly to parents, not below them or over their heads."
The issue: Fitness
The expert: Bob Greene, exercise physiologist, trainer to Oprah, and founder of TheBestLife.com
The pick: "The American Council on Exercise has added an extensive library of exercises to their site, ACEFitness.org. Click on the Get Fit tab and you'll find many moves for every muscle group. The instructions are easy to follow and the information is free."
Keep Reading: How to get the best medical care from your doctor