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Most coffee drinkers can relax about their daily brew, according to a new scientific statement from the American Heart Association on caffeine and heart health. The statement finds that up to 400 milligrams of caffeine a day — roughly three to five 8‑ounce cups of regular black coffee — is generally safe for most adults…

The taste of a madeleine famously sent French writer Marcel Proust back into vivid memories of childhood. New research suggests that this kind of recollection may involve more than the brain alone. Signals from the digestive system may also help determine which food-related experiences become memories