It can be agonizing. You get in bed, turn out the light, and spend the next six hours staring at the clock.

Finally, some good news to share about CT scans for a change.

Dear Pharmacist,

I’ve felt sick for 10 years, and no one has helped me. I read on the Internet about Candida, and I have every symptom possible. I’ve eliminated sugar already, and after 2 months, I feel better. I just found your site and hope you can teach me more about this infection.

With all the messages about our bad eating habits over the last 25 years, many of us have made healthy changes to our diets. You’ve probably made a few changes yourself.

Because of injuries in the springtime, I missed six Boston Marathons back in the 1960s. It wasn't until 40 years later that I found the cause: my vitamin D3 blood level was 20 nmol/l (normal is greater than 75 nmol/L, equal to 30 ng/ml). Recently I moved to Florida and have been relatively injury free for the first time in my life.

There are lots of great doctors out there. In fact, I know a number of them personally. But, unfortunately, it seems that for every good doc there’s a bad apple doing his best to spoil the whole darn barrel.

Sometimes, it’s hard to smell a rat, and if University of California, San Diego professor Terence M. Davidson, MD is correct, zinc-based cold remedies can make it even harder.

Do you want to hear the funniest joke in the world?

It takes just a minute or two to give your hair a thorough washing, but when you multiply that by every day, or at least a few times a week, for a lifetime, it adds up to many minutes -- and loads of exposure to the chemicals in your shampoo.