They say it was the coma, but maybe the sugar overdose really dyed his hair white... (Also, after googling, color blindness can be caused by diabetic hyperglycemia, so maybe the sugar in his coffee contributed to that too...)
(DRINKS BITTER COFFEE); GODOT (FROM PHEONIX WRIGHT ACE ATTORNEY TRIALS AND TRIBULATIONS) DRANK 17 CUPS OF COFFEE EVERY TRIAL HE WAS IN AND YET NEVER OVERDOSE BUT SWEET COFFEE IS ALREADY A LOT; ASKS FOR A BIT MORE SUGAR DUE TO IT BEING TOO BITTER