If you're in the mood for upping your antioxidant levels -- antioxidants can cancel out the cell-damaging effects of free radicals, thus lowering the risk of cancer -- here's one quick and easy tip for you: keep your watermelons warm.

Research shows that watermelons stored at room temperatures have much higher levels of antioxidants (beta-carotene and lycopene) than those kept chilled in the fridge. Warm watermelons are even better than fresh-picked melons.

One caution: once cut, watermelons must refrigerated. So try to enjoy your watermelons as soon as you slice and dice them. Then keep your leftovers cool.

Source: Good Housekeeping, July 2007

First, it seemed eating lycopene-rich tomatoes offered protection against prostate cancer. Now it seems this is not so true. In fact, researchers have found an association between an increased risk of aggressive prostate cancer and beta carotene, an antioxidant related to lycopene.

Lycopene seemed for a short time to be a quick and easy fix for men trying to lower their prostate cancer risk. Yet studies are failing to show any significant differences in blood lycopene levels between men who develop the disease and those who do not.

The largest study to yield these results investigated the role of blood levels of lycopene and other antioxidants in the prevention of prostate cancer. It was an unexpected turn of events that led researchers to the link between the most aggressive cancers and antioxidants found in many vegetables. While the observation may be due to chance, beta carotene is known to increase risk of lung cancer and heart disease in smokers and may be worth a bit more study.