green tea

Dozens of green tea drinks and pills for sale claim to help you burn more fat. But there's scant evidence that green tea, or any other food or drink product, can have a lasting impact on metabolism.

These days, green tea has its health halo pretty firmly affixed. But in Victorian England, adulteration was rampant, and the drink was seen as a "stomach-churning, nerve-jangling threat to health."

Researchers studying the Blue Zones, five regions around the world with lots of centenarians, have come up with this rule: "Drink coffee for breakfast, tea in the afternoon, wine at 5 p.m."