Charles Darwin had lactose intolerance

Charles Darwin had lactose intolerance (ABC Science Online: 26-Apr-05)
Charles Darwin was lactose intolerant, researchers deduce, adding a fresh twist to the mystery of what caused his 40-year-long illness. This would explain the bouts of vomiting, stomach pains, severe tiredness, skin problems and depression Darwin suffered, symptoms a new report says improved when he stopped eating milk and cream. His family also suffered in a similar way, suggesting a genetic component, researchers led by Professor Anthony Campbell from Cardiff University reports in the current issue of the Postgraduate Medical Journal.
There have been loads of explanations put forward for Darwin's mysterious illness. This one sounds pretty plausible.