By contrast, the government recommends a mere 200 to 600 IU a day, depending on age--what you get in two to six cups of fortified milk.

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Pool Six leads the way in terms of Heineken Cups won, with Toulouse and Leicester having won the tournament five times between them.

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Europe had been strong favourites going into the event after winning the last three Cups and five of the last six.

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"You have to drink a lot of it ... at least three, up to six cups a day, to get the effect, " Tallmadge says.

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