Adults who consumed tea at moderate frequencies showed more favorable bone mineral density at key skeletal sites over as long as 13 years, while higher blood levels of several tea-derived flavan-3-ols were also associated with stronger bone measures, according to research published in the American Journal of Clinical Nutrition.
By yourNEWS Media Newsroom.
Moderate tea consumption may be associated with better bone mineral density in middle-aged and older adults, according to a long-running Chinese study that examined skeletal measurements and tea-related compounds in the blood over as many as 13 years.
The research, published online Aug. 16 in the American Journal of Clinical Nutrition, drew on participants in the Guangzhou Nutrition and Health Study and examined bone mineral density, or BMD, and bone mineral content, or BMC, at several important skeletal locations.
Researchers found that people who reported drinking tea at moderate frequencies generally had the most favorable bone measurements, particularly at the lumbar spine and femoral neck.
The findings did not show that greater tea consumption consistently produced stronger bones. Instead, the relationship was nonlinear, with moderate-frequency tea drinkers tending to perform better than both lighter and heavier consumption groups.
Researchers also found associations between favorable bone measurements and circulating concentrations of several flavan-3-ols, plant compounds commonly found in tea.
The strongest and broadest associations were observed for epicatechin gallate, or ECG, and epigallocatechin gallate, or EGCG.
Long-Term Study Tracked Bone Changes at Multiple Sites
The broader analysis included 2,133 participants who underwent dual-energy X-ray absorptiometry, or DXA, scans during four study visits.
Within the longitudinal portion of the research, investigators followed 1,708 middle-aged and older adults for periods extending up to 13 years.
Bone measurements were taken at the whole body, total hip, lumbar spine and femoral neck, allowing researchers to examine whether tea-drinking patterns were associated with skeletal differences across several clinically important regions.
Participants were divided into four categories according to tea-drinking frequency: non-drinkers, low-frequency consumers, moderate-frequency consumers and high-frequency consumers.
Researchers also analyzed blood samples for five individual flavan-3-ols: epicatechin, EGCG, ECG, epigallocatechin and catechin.
Flavan-3-ols are members of the larger flavonoid family of plant compounds and are known for antioxidant and anti-inflammatory properties. Previous observational studies have also investigated possible associations between tea intake and skeletal health.
Moderate Drinkers Recorded More Favorable Bone Measurements
When researchers compared the different tea-consumption groups, moderate-frequency drinkers generally displayed the strongest bone mineral measurements.
The clearest differences appeared at the lumbar spine and femoral neck, where moderate tea consumers had significantly higher adjusted BMD Z-scores than participants in the other consumption categories.
More favorable measurements were also observed at the whole-body level.
The results did not support a simple pattern in which drinking progressively more tea was accompanied by progressively greater bone density.
High-frequency tea consumption did not consistently outperform moderate intake, and researchers were unable to identify a particular number of cups or frequency of consumption that should be considered optimal for skeletal health.
That pattern is consistent with other observational research examining tea and bone density.
A previous Scottish population study found that dietary flavonoids appeared to have a protective association with the femoral neck, while a 2026 study involving nearly 10,000 older Australian women reported that tea drinkers maintained slightly greater bone density than women who did not drink tea.
Those findings, like the latest research, are observational and do not prove that tea itself caused the differences.
Tea Compounds Also Associated With Bone Mineral Measures
The researchers found additional evidence of a potential relationship when they examined flavan-3-ols circulating in participants’ blood rather than relying solely on reported tea-drinking habits.
Higher concentrations of several of the compounds were generally associated with more favorable BMD and BMC measurements.
ECG and EGCG demonstrated particularly extensive associations.
EGCG is the most abundant polyphenolic compound in green tea, which is especially rich in flavonoids.
Researchers have long been interested in tea polyphenols because laboratory and preclinical studies suggest they may influence biological processes connected with bone remodeling.
Bone is not static tissue. It is continuously broken down and rebuilt through the competing activity of osteoclasts, which resorb bone, and osteoblasts, which form new bone.
Experimental research suggests tea polyphenols may interact with pathways involving inflammation and oxidative stress and potentially affect the function of both types of bone cells.
That possibility is of particular interest because increased oxidative stress has previously been associated with lower bone mineral density in human studies.
The latest findings, however, did not establish that flavan-3-ols directly improved participants’ bones.
As with reported tea consumption, circulating concentrations of the compounds did not display a consistently linear relationship with skeletal measurements. Higher levels therefore did not automatically correspond with progressively higher bone density.
Findings Do Not Show That Tea Prevents Osteoporosis
The researchers cautioned against interpreting the study as evidence that tea can prevent osteoporosis or fractures.
Investigators measured bone mineral density and bone mineral content rather than following participants specifically for fractures or diagnosing whether tea consumption changed their likelihood of developing osteoporosis.
The observational study design also prevents researchers from establishing cause and effect.
People who drink moderate amounts of tea may differ from non-drinkers or heavy tea drinkers in other ways that influence bone health, including diet, activity levels or other lifestyle and health characteristics.
Researchers also did not determine a specific quantity, preparation or frequency of tea that people should consume for their bones.
The findings therefore do not provide a clinical recommendation to begin drinking tea, increase tea intake or substitute tea for established strategies used to maintain bone strength.
Bone Health Depends on More Than a Single Beverage
Registered dietitian nutritionist Molly Knudsen said tea may fit within a broader dietary pattern that supports skeletal health but should not be treated as the dominant factor.
“Tea can certainly be part of an overall bone-supportive dietary pattern, particularly because it provides flavan-3-ols,” Knudsen wrote in an article discussing the findings.
Bone strength is influenced by numerous dietary, physiological and lifestyle factors.
Because bone tissue continually remodels throughout life, maintaining skeletal health generally involves adequate intake of protein and important micronutrients, including calcium and vitamin D, alongside weight-bearing and strength-training exercise.
The new findings add tea and its flavan-3-ol compounds to a growing area of research examining whether plant-derived foods and beverages may contribute to that broader picture.
Over the lengthy follow-up period, moderate-frequency tea consumers showed the most favorable bone mineral density measurements at several sites, and blood concentrations of ECG and EGCG were also associated with better skeletal measures.
Researchers emphasized, however, that the results establish an association rather than proof that tea strengthens bones.
For now, the study suggests that moderate tea consumption can be considered one component of a varied dietary pattern associated with favorable bone health, rather than a stand-alone strategy for preventing osteoporosis or fractures.
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