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Red wine may be much more potent than was thought in extending human lifespan, researchers say in a new report that is likely to give impetus to the rapidly growing search for longevity drugs.

Red wine contains many resveratrol-like compounds that may be beneficial. Taking these into account, as well as mice’s metabolic rate, a mere four, five-ounce glasses of wine “starts getting close” to the amount of resveratrol they found effective, Dr. Weindruch said.