It's great to bring leftovers for lunch, but I cringe when I see people reheating their leftovers in a plastic container. Heating plastic containers can release BPA (bisphenol A) into your food. BPA is a chemical that's a known endocrine disruptor, which could be linked to prostate and breast cancer, infertility, heart disease and diabetes. So to minimize your exposure to BPA, transfer your home-packed lunch to a ceramic bowl or plate before reheating in the microwave.

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