GreenTea
Antioxidants decrease an average of 32% after 6 months on the shelf, according to a 2009 study in the Journal of Food Science. These antioxidants, known as catechins, may decrease your risk of several types of cancer, but they are sensitive to both oxygen and light. Sadly, tea, unlike wine, does not improve with age.
Make It Last: "Buy tea in airtight packages such as tins, rather than cellophane wraps, which air can penetrate," advises Rona Tison of ITO EN, the world's largest supplier of green tea. Store your tea bags in sealed, opaque canisters in a cool spot. "Green tea is more sensitive to heat than black tea , so place your sealed container in the refrigerator to keep the leaves fresh and healthy for as long as possible," she says.
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