The team of researchers, led by Dr Anastasis Stephanou, carried out laboratory tests on heart cells which found that a major chemical component of green tea known as epigallocatechin-3-gallate (EGCG) can reduce cell death after a heart attack or stroke.

BBC: NEWS | Health | Green tea 'may protect the heart'

Vytorin critics said the problem was that a new component in the drug, the chemical ezetimibe, lowered cholesterol but hadn't been proven to prevent heart attacks or deaths.

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When working, it splits light into its component colours, to reveal information about the chemical content, temperature and motion of planets, comets, stars, interstellar gas and galaxies.

BBC: Brute force helps Hubble renewal

The crucial component is a thin membrane laced with expensive elements that helps conduct the chemical reaction.

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