Study Reveals That Middle-Aged Women Who Drink Caffeinated Coffee May Experience Healthier Aging

A recent study conducted by researchers at Harvard Chan Public Health indicates that caffeine and regular coffee consumption during middle age are modestly and positively linked to various aspects of healthy aging in women. However, no notable correlation was found with tea or caffeinated coffee, whereas increased cola intake was associated with healthy aging and a lower likelihood of related health issues.

“While earlier studies have linked coffee to specific health outcomes, this research is the first to evaluate coffee’s impact on multiple aspects of aging over three decades,” stated Dr. Sarah Mahadhabi, a researcher at Harvard Chan School of Public Health and the University of Toronto.

“The findings indicate that coffee may uniquely support aging processes that foster both mental and physical well-being.”

“Our study boasts several significant strengths, including a substantial sample size and three decades of follow-up. Moreover, we assessed various elements of longevity and healthy aging, in conjunction with comprehensive data on nutrition and lifestyle habits collected every four years after the study began.”

The research encompassed 47,513 women from the Nurses Health Survey, utilizing dietary and health data gathered since 1984.

Researchers evaluated caffeine consumption using a validated food frequency questionnaire, focusing on major caffeine sources like coffee, tea, cola, and caffeinated coffee.

Healthy aging was characterized as living to age 70 and above, free from 11 major chronic diseases, preserving physical abilities, maintaining mental health, exhibiting no cognitive impairment, and having no memory complaints.

Following 30 years of monitoring, researchers assessed how the probability of healthy aging varied with each additional 80 mg of caffeine consumed daily by the participants.

They also examined specific beverage types, including coffee, tea, caffeinated coffee (per 8-ounce cup), and cola (per 12-ounce glass).

The preliminary analyses identified other factors that might influence healthy aging, such as body weight, smoking habits, alcohol consumption, physical activity levels, educational attainment, and protein intake.

By 2016, 3,706 women in the study met all criteria for being classified as healthy agers.

Women aged between 45-60 typically consumed an average of 315 mg of caffeine daily, with over 80% of that derived from regular coffee consumption.

For those in the Healthy Agers Group, each additional cup of coffee per day was linked to a 2% to 5% increased likelihood of aging well, up to about 5 small cups per day, or approximately 2.5 standard cups by today’s measurements.

Researchers discovered no significant correlation between the consumption of decaffeinated coffee or tea and an elevated likelihood of healthy aging.

Importantly, for each additional glass of soda with caffeine, the chances of healthy aging decreased by 20-26%, indicating that not all caffeine sources are beneficial.

“While these findings are preliminary, they suggest that small, consistent habits can profoundly influence long-term health,” Dr. Mahadhabi noted.

“Moderate coffee intake can provide a range of protective benefits when coupled with other healthy practices, such as regular exercise, a balanced diet, and avoiding smoking.”

“This study expands on previous evidence linking coffee consumption to healthy aging, but the benefits of coffee are relatively modest compared to the impact of an overall healthy lifestyle, warranting further investigation.”

The findings were presented at the Survey results on June 2nd during the Nutrition 2025 annual meeting hosted by the American Nutrition Association.

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Sarah Mahadabi et al. Caffeine intake and healthy aging in women. Nutrition 2025 Summary #P22-039-25