Black tea consumption linked to decrease threat of CVD mortality
Bethesda, USA – Ingesting tea has a number of well being advantages, however most research have been performed in areas the place inexperienced tea predominates. New knowledge from Britain – the place the custom of “ afternoon tea (afternoon tea) is effectively entrenched – present that black tea can be related to well being advantages.
Findings come from a potential research of practically 500,000 cohort members UK Biobankamongst whom the consumption of black tea was frequent. They recommend that black tea consumption could also be related to a reasonably decrease all-cause mortality threat, and that the chance was lowest in individuals who drank two or extra cups of tea every day.
The research was printed on-line this September 5 in Annals of Inside Medication.
Inverse affiliation with mortality from heart problems
Throughout a median follow-up of 11.2 years, individuals who drank not less than two cups of tea a day had a decrease threat of all-cause mortality, the researcher reported. Maki Inoue ChoiPhD, and colleagues on the Nationwide Most cancers Institute in Bethesda, Maryland.
After multivariate adjustment, the hazard ratios of loss of life amongst tea drinkers, in comparison with no tea drinkers, have been comparable for all ranges of drinker: 0.95 for every day drinker lower than or equal to 1 cup , 0.87 for 2-3 cups, 0.88 for 4-5 cups, 0.88 for 6-7 cups, 0.91 for 8-9 cups, and 0.89 for 10 cups or extra.
Tea consumption has additionally proven an inverse affiliation with mortality from heart problems (Dangerousness charge adjusted [aHR] starting from 0.98 to 0.76), ischemic coronary heart illness (aHR starting from 1.03 to 0.74) and stroke (aHR starting from 0.92 to 0.48). Nonetheless, the researchers add that “no clear development was noticed for mortality as a result of most cancers or respiratory ailments, with associations between the best consumption classes tending in the direction of nullity”.
There’s “no clear reply” to why no affiliation was noticed between tea consumption and most cancers mortality within the present research, Dr. Inoue-Choi mentioned throughout a briefing.
She added that the results have been obvious whatever the addition of milk or sugar to the tea, the temperature of the tea, or genetic variations within the members’ caffeine metabolism.
Dr. Inoue-Choi and her colleagues managed for these elements, in addition to many others that would confound the outcomes, together with espresso consumption and baseline demographic and well being traits.
Tea, a extensively consumed drink on the earth
The research topics have been 498,043 adults with a median age at baseline of 56.5 years. About 85% mentioned they drank tea, 90% black tea, and most drank 2-3 cups (29%), 4-5 cups (26%) or 6-7 cups (12%) per day.
One limitation of the research is the lack of understanding on sure elements of tea consumption, reminiscent of portion dimension and tea energy, the authors word.
Tea is without doubt one of the most ceaselessly consumed drinks on the earth, and research performed in international locations the place inexperienced tea is in style, reminiscent of China and Japan, have demonstrated its well being advantages. Information from locations the place black tea is extra generally consumed is missing and has supplied conflicting outcomes, she famous.
Through polyphenols and flavonoids
A putative mechanism of motion linked to tea consumption is the discount of oxidative stress and irritation by way of “polyphenols and flavonoids, specifically catechins and their oxidized merchandise,” clarify the authors. Since oxidative stress and irritation can promote carcinogenesis, lowering oxidative stress and irritation may enhance endothelial perform, they add.
“Whereas these outcomes are prone to reassure tea drinkers, they don’t point out that folks ought to begin consuming tea or modify their tea consumption to reap well being advantages,” she mentioned. , explaining that “the findings should be replicated in future research and prolonged to different numerous populations. »
This research was funded by the Nationwide Most cancers Institute Intramural Analysis Program and the NCI Division of Most cancers Epidemiology and Genetics. The authors reported no related monetary relationships.
The article initially appeared on Medscape.com as Ingesting Black Tea Linked to Decrease Danger of Dying From CVD. Translated by Stephanie Lavaud.
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