Telomeres are located at the tips of DNA chromosomes and shorten with cell aging and oxidative stress. Telomere shortening is associated with human aging and age-related diseases. Studies show that environmental factors and lifestyle choices can affect oxidative stress (damage caused by free radicals). Now research reports that male tea drinkers have longer telomeres than non-tea drinkers. This suggests that antioxidants found in tea may protect telomeres from oxidative damage and shortening.
The study, published in the British Journal of Nutrition, examined the association of food choices and telomere length in elderly Chinese men and women. Researchers at the Chinese University of Hong Kong analyzed data from a 2001 to 2003 health survey of 976 men and 1,030 women age 65 and over. DNA telomere length was extracted from the participant's blood samples. The participant's food groups intake was determined from food frequency questionnaires.
"In conclusion, Chinese tea consumption was positively associated with telomere length in elderly Chinese men," the study authors write.
The researchers suggest that diet may have less of an influence on telomere length in women due to hormones and other factors.
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