It's a common refrain from men, women and -- especially -- teens alike as they gaze into the mirror each morning: "Why do I keep getting all these pimples?!?!"

Really? No clue, huh?

Let me help you out: Most cases of acne at any age are caused by diet -- especially sugar and the rest of the carbohydrate family, and a leading dermatologist confirms it.

At a recent meeting of the American Academy of Dermatology, Dr. Alan R. Shalita urged his fellow skin care specialists to tell their patients to just lay off the carbs for quick and easy acne control.

But you don't need an expert opinion on this -- the sugar-acne connection has been made so many times it's as clear as the skin you're hoping for. One study in 2004 even found that a low-carb diet slashed acne by 50 percent in just 12 weeks.

So if you really want to put the squeeze on your zits, you're going to have to learn to live without your favorite junk food.

For an extra boost, call in the big guns -- and by that, I don't mean toxic drugstore pimple creams or prescription acne meds that can lead to bizarre behavior up to and including suicide.

Try colored light therapy instead. Dismissed as quackery just a few years ago, colored lights have proven to be so effective at clearing skin that even many mainstream dermatologists now use them.

Just be sure to pass on the millions of gadgets for sale online. Most of them are just expensive light bulbs, and many even use the wrong color.

They won't clear anything other than money from your wallet!

Find a naturopathic physician or skin care specialist who's experienced in color therapy instead -- and get used to seeing a clear new face in the mirror.