Can what you eat affect your acne? Scientists say food doesn't cause acne, but in some people it may make it worse.

The biggest offenders: foods packed with sugar such as sodas, cakes and cookies, and high fat dairy like we find in ice cream.

For decades, scientists have been debating the suspected link between food and acne.

A new article in the Journal of the Academy of Nutrition and Dietetics looked at almost 30 studies over the last 50 years. But the findings were inconclusive.

Bottom line: You don't want to reach for sugary treats - just another reason to eat a healthy diet.

This means eating lean protein, going easy on the saturated fats, and consuming plenty of whole grains, and fruits and vegetables, the study authors suggest.

Dermatologists say cutting back on high fat dairy helps some of their patients.

There is some evidence that dairy may affect some people's skin and I do have people who go off dairy and find their skin is clearer, said Dr. Rutledge Forney, dermatologist.

But don't cut out the good dairy such as low-fat milk or yogurt. These contain calcium and other nutrients needed to build strong bones.

If you have acne, check with your doctor to see if a change in diet might help.

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