Your daily cup of coffee might offer more than just a morning pick-me-up; it could actually influence how well you age. A new study, done by researchers in the Harvard T.H. Chan School of Public Health, involving nearly 50,000 women, investigated the long-term effects of drinking tea, coffee, and cola. The research found that coffee, specifically caffeinated coffee, can positively impact women's mental and physical health as they get older.How Coffee Might Help Older WomenResearchers discovered that drinking coffee regularly could help women stay mentally sharp, physically strong, and generally well as they age. But, these good effects were only seen with coffee that had caffeine. People who drank decaf coffee didn't get the same benefits, and neither did tea drinkers. Even worse, the study found that women who drank soda had a "much lower chance of aging healthily."Researchers said that while past studies linked coffee to certain health outcomes, her study is the first to look at how coffee affects many parts of aging over 30 years. She added that the findings suggest caffeinated coffee, unlike tea or decaf, might uniquely help people age in a way that keeps both their mental and physical abilities strong. These results were shared at a big meeting for nutrition experts.What the Study Looked AtResearchers said that study was strong because it included many people and followed them for 30 years. They also looked at different ways people age well and collected lots of details about their eating and lifestyle habits every four years.The researchers looked at information from nearly 47,513 women who were part of a long-term health study since 1984. They figured out how much caffeine these women consumed by asking about their intake of common caffeinated drinks like coffee, tea, soda, and decaf coffee.They defined "healthy aging" as living to age 70 or older, not having 11 major long-term diseases, being able to move well, having good mental health, not having thinking problems, and not complaining about memory issues. After 30 years, the team estimated how the chance of healthy aging changed for every 80 mg of caffeine (about one small cup of coffee) that people drank daily.They also looked at specific drinks. Their early analysis also considered other things that could affect healthy aging, such as body weight, smoking, drinking alcohol, physical activity, education level, and how much protein was in their diet. The data showed that by 2016, 3,706 of the women met all the requirements for healthy aging. In their middle age (45-60), these women typically drank about 315 mg of caffeine per day. This is roughly the amount in three small cups of coffee or one and a half large cups by today's standards. More than 80% of that caffeine came from regular coffee.Regular Coffee vs. Other DrinksFor the women who aged healthily, each extra cup of regular coffee per day was linked to a 2% to 5% higher chance of doing well in later life. This benefit went up to about five small cups of coffee per day (or about 2.5 cups using today's sizes). The scientists found no clear link between drinking decaf coffee or tea and a higher chance of healthy aging. However, every extra small glass of soda was linked to a 20% to 26% lower chance of healthy aging. This shows that not all caffeine sources are good for you.