One of those undertakers with this surname was inspired by William Harvey to forego consuming bread, sugar and beer.  
A family of funeral directors with this surname handled the deaths of both George III and George IV.  One of those undertakers with this surname was inspired by William Harvey to forego consuming bread, sugar and beer.  That same man with this surname wrote Letter on Corpulence, Addressed to the Public, which kicked off a low-carb diet craze in the 1860s so popular that the Swedish word for diet is still named for him.  Another man with this surname assisted Wilbur Franks in inventing the G-suit but is best known for building on the work of Joseph von (*) Mering and Oskar Minkowski.  That Canadian with this surname gave half of his Nobel prize winnings to his medical student, Charles H. Best, after the Nobel committee passed Best over in favor of J. J. R. Macleod in 1923.  For 10 points, give the surname of the man who blocked the pancreatic duct of dogs in order to extract insulin.
A family of funeral directors with this surname handled the deaths of both George III and George IV.  
Banting