What to know about a new study on coffee, tea, caffeine and dementia risk

A long-term analysis shows that people who drink caffeinated coffee and tea have a lower risk of developing dementia, although the study does not prove cause and effect.

Dr. Céline Gounder, CBS News medical contributor and editor-at-large for public health at KFF Health News, warned that the results should be taken "with a massive grain of salt."

The research, published in the medical journal JAMA on Monday, analyzed data on 131,821 people who had participated in two studies that ran from 1986 to 2023. Of that group, 11,033 developed dementia during the period studied...