India, June 3 -- A new study from Harvard University followed nearly 50,000 women for 30 years as part of the Nurses' Health Study. The research found that women who drank coffee regularly were more likely to stay mentally sharp and physically strong as they got older.
During the study period, the researchers looked at how much caffeine the women consumed from different drinks, like regular and decaf coffee, tea, and cola. They used food surveys from 1984 and 1986 to estimate how much caffeine each woman was drinking, then tracked their health through 2016.
They measured caffeine in 80 milligram steps, which is about the amount in one small cup of coffee, and looked at how many cups or glasses of each drink women had per day.
The study a...