Habitual tea drinking can lead to higher bone density, particularly for women, and lower the risk of bone fractures, according to a prospective study of 450,000 adults by Chinese researchers.
Although little is known about the cause of the association, the research conducted by the School of Public Health with Peking University found daily consumers of green tea and those who had drunk tea for more than 30 years have a lower rate of fractures according to their hospitalization records, reports Xinhua news agency.
The paper on the research was published in the international journals Nutrients and Osteoporosis International.
Li Liming, a professor who led the research, said the study included 453,625 people randomly selected from the China Kadoorie Biobank and documented their records on hospitalized fractures.
Based on their self-reported tea consumption, the researchers found that compared with those who do not drink tea, daily tea consumers have a 12 percent lower risk of fracture.
Those who drink green tea or have drunk tea for over 30 years have a 20 to 30 percent lower risk in hip bone fracture.
Li said bone density had become an important subject of public health. Previous researches also suggested a certain association between habitual tea drinking and higher bone density among menopausal women.
He said the prospective study still needs a more substantial sample analysis for more accurate results linking the association between tea drinking and bone density since tea drinking may affect other factors such as improving people’s concentration and vigilance. (IANS)
Good news for tea lovers! Researchers have found that drinking tea at least three times a week is linked with a longer and healthier life.
“Habitual tea consumption is associated with lower risks of cardiovascular disease and all-cause death,” said study first author Xinyan Wang, Chinese Academy of Medical Sciences, Beijing in China.
“The favourable health effects are the most robust for green tea and for long-term habitual tea drinkers,” Wang added.
The analysis, published in the European Journal of Preventive Cardiology, included 1,00,902 participants of the China-PAR project2 with no history of heart attack, stroke, or cancer.
Participants were classified into two groups: habitual tea drinkers (three or more times a week) and never or non-habitual tea drinkers (less than three times a week) and followed-up for a median of 7.3 years.
Habitual tea consumption was associated with more healthy years of life and longer life expectancy.
For example, the analyses estimated that 50-year-old habitual tea drinkers would develop coronary heart disease and stroke 1.41 years later and live 1.26 years longer than those who never or seldom drank tea.
Compared with never or non-habitual tea drinkers, habitual tea consumers had a 20 per cent lower risk of incident heart disease and stroke, 22 per cent lower risk of fatal heart disease and stroke, and 15 per cent decreased risk of all-cause death.
The potential influence of changes in tea drinking behaviour were analysed in a subset of 14,081 participants with assessments at two time points.
The average duration between the two surveys was 8.2 years, and the median follow-up after the second survey was 5.3 years.
Habitual tea drinkers who maintained their habit in both surveys had a 39 per cent lower risk of incident heart disease and stroke, 56 per cent lower risk of fatal heart disease and stroke, and 29 per cent decreased risk of all-cause death compared to consistent never or non-habitual tea drinkers.
“The protective effects of tea were most pronounced among the consistent habitual tea drinking group. Mechanism studies have suggested that the main bioactive compounds in tea, namely polyphenols, are not stored in the body long-term,” said study senior author Dongfeng Gu.
“Thus, frequent tea intake over an extended period may be necessary for the cardioprotective effect,” Gu added.
In a sub-analysis by type of tea, drinking green tea was linked with approximately 25 per cent lower risks for incident heart disease and stroke, fatal heart disease and stroke, and all-cause death.
However, no significant associations were observed for black tea, the study said.
According to the researchers, two factors may be at play. First, green tea is a rich source of polyphenols which protect against cardiovascular disease and its risk factors, including high blood pressure and dyslipidaemia.