Research: Tea’s health benefits boost its popularity

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“We don’t clearly understand why tea is so beneficial, but we know it is,” said Thomas G. Sherman, an associate professor in the Department of Pharmacology and Physiology at Georgetown University Medical Center. “There are lots of epidemiological studies, and so of course people see these studies and want to drink tea and gain these benefits.”

Nationally, tea purchases have risen for 20 consecutive years, annual supermarket sales have surpassed $2.2 billion, and away-from-home consumption of tea has grown by at least 10 percent a year for a decade, according to the Tea Association of the USA, a New York-based industry group. On any given day, the association says, 160 million Americans drink tea.

Although coffee is still king in the United States, change is brewing. Department of Agriculture statistics show tea drinking has increased as coffee drinking has declined: Per-person tea consumption was nine gallons in 2009, up from 7.3 gallons in 1980; per-person coffee consumption was 23.3 gallons in 2009, down from 26.7 gallons in 1980 

Tea comes from the leaves of the warm-weather evergreen Camellia sinensis, and it is classified into five types: black, white, green, oolong and puerh.

Experts say all are healthful. Many scientists link health benefits to tea’s polyphenol antioxidants, which protect against oxidative stress, but others say they don’t know exactly which chemicals or combinations of chemicals  ... Read More

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