Good news, java junkies: Your daily habit can be good for your brain. Several studies have shown that caffeine has a positive effect on memory—and the benefits are most pronounced in the people of middle age and over 65. Memory peaks in the morning and declines over the day, but research published in the journal Psychological Science found that older adults who drank two cups of coffee didn’t suffer this “time-of-day” effect.
Recommendation: Drink up. Just don’t exceed 300mg of caffeine a day, which is about three cups of drip coffee.