Coffee can improve memory, but don’t drink too much. Researchers asked 160 people to look at pictures of objects, then gave them either a placebo or a tablet containing 200 milligrams of caffeine—equivalent to a strong cup of coffee. When the volunteers were shown a larger set of images the next day and asked to identify which ones were old, new, or similar, the caffeinated group was more likely to recognize very slight changes in the pictures. Dosage was crucial, however: Researchers found that 100-milligram tablets didn’t improve memory, while 300-milligram doses caused headaches and jitteriness.
I will keep my two cups of coffee as a part of my daily ritual.
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