However, 50 minutes after the task, cortisol levels had dropped by an average of 47% in the tea-drinking group compared with 27% in the fake tea group.

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As the etiquette of tea-drinking was complicated, so too was the etiquette of West Indian sugar-avoidance.

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After a hectic day of media interviews, tea-drinking and chatting with the "old boys", they took part in the formal closure ceremony, which included a fly-by and drill display.

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Keurig, and tea-drinking nations like China and Japan.

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Mr Berezovsky was a close friend of murdered Russian emigre and former KGB officer Alexander Litvinenko, who died in 2006 after he was poisoned with the radioactive material polonium-210 while drinking tea at a London meeting.

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For Shelley, tea-drinking was a passion.

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Eric Childs had been drinking kombucha for years - a fermented tea - and was looking for a commercial opportunity a few years ago.

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All drinks were tea-coloured, but were designed to mask some of the normal sensory cues associated with tea drinking (such as smell, taste and familiarity of the brew).

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Drinking tea caused levels of both glycine, which can ease muscle spasms, and the anti-inflammatory hippurate in the urine to go up.

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