A decade-long study of nearly 10,000 older women ties bone loss to very high coffee intake, while tea shows a small hip-bone boost.
Story Highlights
- Researchers tracked 9,704 women for about 10 years in a major bone-health study.
- Tea drinkers showed a small but statistically significant gain in hip bone density.
- Coffee showed no overall harm, but more than five cups a day linked to lower bone density.
- A university summary confirms the findings and notes the effect was modest.
What The New Study Measured And Found
Researchers analyzed data from the Study of Osteoporotic Fractures, which followed 9,704 women age 65 and older for about a decade. They measured coffee and tea intake at several visits and tracked bone mineral density at the hip. The study found no overall link between coffee and hip or femoral neck bone density. It did find that tea drinkers had slightly higher total hip bone density than non-tea drinkers, and the result reached statistical significance.
The same analysis used spline models to test very high coffee intake. Those models suggested a threshold: women who drank more than five cups of coffee per day had lower bone mineral density. The study did not find harm at lower coffee levels. The authors also reported subgroup differences, including a negative link between coffee and femoral neck bone density in women with higher alcohol use, while tea looked more helpful among women with obesity.
How Big The Effect Is And Who It Applies To
The reported tea benefit was small in absolute terms. The average difference in total hip bone density was about 0.003 grams per square centimeter, which was statistically significant but modest in size. The research followed older women only, so the results do not directly show what happens in men or in younger adults. Intake was self-reported, which can miss details on cup size, brewing method, or caffeine level, and that can blunt precision.
Flinders University published a plain-language summary that matched the paper’s core points. It confirmed tea drinkers showed a slight but real improvement in hip bone density. It also reinforced the coffee message: there was no overall harm signal, with concern appearing only at very high intake levels. The university emphasized the modest size of the tea effect and the careful, measured nature of the findings.
What This Means For Everyday Choices
For most people, the study suggests normal coffee habits are not linked to weaker bones. The concern shows up above five cups per day, which is beyond how most Americans drink coffee. Tea may offer a small edge for hip bone density in older women, though the gain is not large. Common sense still applies: pair your daily drink with calcium, vitamin D, protein, and weight-bearing exercise, which are proven steps to protect bones over time.
New 10-year study: women who drank tea had slightly stronger hip bones, while those drinking more than 5 cups of coffee daily showed lower bone density. Moderate coffee (2-3 cups) appeared safe. Small effects, but worth knowing if osteoporosis runs in your family. ☕🍵 pic.twitter.com/gkK10lzwHP
— Wellness Science (@wellnessciences) September 2, 2026
The wider research picture is mixed but useful. A 2025 meta-analysis linked both coffee and tea to lower odds of osteoporosis, which lines up with a cautious take that moderate intake is safe and may help. That supports the idea that dose and context matter more than panic headlines. The practical takeaway is simple: enjoy coffee in moderation, consider tea if you like it, and keep bone-healthy habits front and center.
Sources:
sciencedaily.com, news.flinders.edu.au, pmc.ncbi.nlm.nih.gov
