Reading progress update: I've read 336 out of 377 pages.

Napoleon's Buttons: How 17 Molecules Changed History - Jay Burreson, Penny Le Couteur

The British habit of taking quinine as a prophylactic precaution against malaria developed into the evening “gin and tonic”—the gin being considered necessary to make the bitter-tasting quinine in the tonic water palatable.

Sure. Sure. Of course. And while we're at it, I'm sure the alcohol in the gin really was added also to kill off any impurities that may have entered the tonic...