Harvard: Drinking Coffee Daily May Extend Women’s Lifespan

Light House Denver – Drinking coffee every morning is more than a pick-me-up; it may help extend women’s lifespan and support healthy aging. This was revealed in a Harvard University study that analyzed nearly 50,000 women over more than 30 years.

The study is part of the Nurses’ Health Study and was presented at the annual meeting of the American Society for Nutrition (NUTRITION 2025) in Orlando, USA. The results showed that middle-aged women who regularly consumed caffeinated coffee had a higher chance of extending women’s lifespan. They were more likely to reach old age in good physical and mental health.

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Not Just About Caffeine

Interestingly, researchers did not find this positive effect in people who consumed tea, decaffeinated coffee, or caffeinated soda. This means the benefits are not solely due to caffeine. They also come from other bioactive compounds in coffee, such as polyphenols and antioxidants.

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“Healthy aging in this study means growing older without major chronic diseases, while maintaining good physical and cognitive function,” explained Sara Mahdavi, Ph.D., a researcher at the Harvard T.H. Chan School of Public Health.

Consistent Findings

On average, women in the “healthy aging” group consumed about 315 mg of caffeine per day, mostly from coffee. Each additional cup of coffee per day increased the likelihood of aging healthily by 2–5%.

Researchers found that daily consumption of caffeinated soda decreased the chances of healthy aging by 20–26%.

Moderation Is Key

Although the findings are promising, Mahdavi emphasized that the study is observational and does not prove a direct cause-and-effect relationship. Moreover, most participants were highly educated white women. Therefore, the researchers caution that the results may not apply to all populations.

“Coffee can be part of a healthy lifestyle when consumed in moderation and combined with a balanced diet and an active lifestyle,” Mahdavi concluded.