A decade-long study of nearly 10,000 older women found tea linked to slightly stronger hips, while very heavy coffee intake showed a possible bone downside.
Story Snapshot
- Researchers tracked 9,704 women aged 65 and older for about 10 years.
- Tea drinking was tied to a small but significant increase in total hip bone density.
- Coffee showed no overall harm, but more than five cups a day was linked to lower bone density in models.
- Other reviews find mixed results, showing how diet studies often give modest, nuanced signals.
What the new study actually measured
Researchers used the Study of Osteoporotic Fractures, which followed 9,704 women aged 65 and older. They measured bone mineral density at the hip and neck of the femur. They also asked about coffee and tea intake at several visits across about 10 years. The team analyzed changes over time rather than a single snapshot. This design helps reduce noise from one-off answers and age effects across the cohort.
Tea intake was linked to a small rise in total hip bone mineral density. The average difference was about 0.003 grams per square centimeter. That effect was modest but statistically significant. The benefit appeared strongest in women with obesity, suggesting body weight may shape how tea interacts with bone health. University coverage of the paper matched the journal’s core finding and stressed the small size of the effect.
How coffee fit into the results
Coffee intake showed no significant overall link with hip or femoral neck bone mineral density. That means average coffee drinkers did not see clear harm or benefit. However, when the team used flexible curve models, a pattern appeared at very high intake. Drinking more than five cups per day was associated with lower bone density in those models. Women who also drank more alcohol saw a stronger negative link at the femoral neck.
These coffee patterns matter for headlines. The core paper does not say “coffee weakens bones” for most people. It points to possible risk at very high intake and in certain subgroups. That is an important guardrail for readers who enjoy one to three cups per day. It also highlights how lifestyle mix, like alcohol use, can change risk for the same habit.
How this fits with the wider evidence
Nutrition research often reports small effects that depend on dose, age, and other habits. A 2023 review of many studies found no strong tie between daily coffee or tea and bone density or hip fracture risk. A 2025 review reached the other direction on osteoporosis risk, finding lower odds with both drinks. These mixed signals suggest any effect is likely modest and shaped by who drinks what, and how much.
For readers trying to act on this, the shared ground is simple. Moderate coffee is not linked to worse bone density in this study. Very high coffee intake, above five cups daily, may be a concern. Tea seems to offer a small hip benefit in older women. None of the results prove cause and effect because the research is observational, but they offer practical guardrails for daily choices.
Why this matters beyond the lab
Older Americans face high health costs and mixed guidance from officials and experts. People want clear steps that fit a tight budget. Tea is affordable and widely available. Cutting back from very high coffee intake costs nothing. These findings give low-friction options that do not depend on complex programs or pricey supplements. They also show the need for honest nuance in public health messages, not scare lines or hype.
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
Policy and media often reduce complex science to simple rules. That can breed distrust when rules shift. Clear signals from this study are limited but useful: enjoy tea if you like it, keep coffee in the moderate range, and watch alcohol if bone health is a concern. Better data, including studies in men and younger adults, will help sharpen these guardrails and turn modest clues into firmer guidance over time.
Sources:
sciencedaily.com, news.flinders.edu.au, mdpi.com, pmc.ncbi.nlm.nih.gov
