Your morning brew may be affecting your bones — here's what the research says

Tea drinkers may have a slight edge when it comes to bone health, while heavy coffee drinkers could be at a disadvantage. A new 10-year study from Flinders University, published in Nutrients, tracked nearly 10,000 women aged 65 and older and found that regular tea consumption was linked to modestly higher total hip bone mineral density (BMD). Meanwhile, drinking more than five cups of coffee per day was associated with lower BMD — though moderate coffee intake (around 2–3 cups daily) appeared harmless.

The effects weren't uniform across all women. Heavy alcohol drinkers saw stronger negative associations with high coffee intake, while the bone-protective effects of tea were more pronounced in women with obesity. Researchers attribute tea's potential benefit to catechins, compounds that may promote bone formation and slow breakdown. Coffee's caffeine, on the other hand, may interfere with calcium absorption — though adding milk can help offset this.

Key Takeaways

• Tea drinking was associated with slightly higher hip BMD — a statistically significant, though modest, finding
• More than 5 cups of coffee/day linked to lower bone density, especially in women who drink alcohol
• Moderate coffee consumption (2–3 cups/day) showed no significant harm to bone health
• Calcium and vitamin D remain the cornerstones of bone health, but beverage habits may play a supporting role

Why it matters: Osteoporosis affects 1 in 3 women over 50 and drives millions of fractures annually. With billions of people drinking coffee or tea daily, even small dietary influences on bone density carry significant population-level implications — making this a practical talking point for primary care providers counseling older women on bone health.