Doctors Chris and Xand van Tulleken put competing health theories to the test with the help of 30 other pairs of identical twins.
Chris van Tulleken
Xand van Tulleken
Score: 9.3
Score: 9.0
Score: 0.0
Score: 6.0
Score: 0.0
Score: 0.0
Score: 6.2
Score: 8.5
