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Doctors Chris and Xand van Tulleken put competing health theories to the test with the help of 30 other pairs of identical twins.
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Twins find out if its possible to get a better brain, repel mosquitoes and get fit just by watching TV!
Identical twins put health theories to the test. Twins test the best way to kick a habit, see if hand-washing keeps you healthy and try to improve concentration.
Identical twins test the best way to learn a new language, attempt to look younger and test an easy way to lower your calorie count.
