You jolt awake at 2:30 a.m., a monologue of catastrophe passing through your head like the news crawl on CNN: What was inside those enchiladas I ate for dinner? Is the ladies' room at work really clean? Is my microwave going to kill me?

Fear not (okay, have a little fear). We queried scientists, physicians, researchers and others to find out the answers to a few of the most popularly worry-making health questions out there.

A Hypochondriac's Guide to Life's Daily Health Perils

• Can food coloring poison you?
• Are warts contagious?
• Can my cell phone give me brain cancer?
• Can cooking with aluminum pots and pans give you Alzheimer's?
• Are aspartame and saccharin bad for you?
• Do microwave ovens cause infertility?
• Can tooth-whitening wreck your teeth?