[ Bruce took a slow and careful sip, barely getting a taste before lowering it again. That wasn't so bad, actually. ]

Coffee. Black tea isn't particularly nice either, but coffee gets me more on edge. Absolutely no energy drinks, obviously. I also like to avoid anything spicy or too sweet. And generally I've toned down a lot on my salt intake over the years.

[ Basically he approached his diet with the same rigorous attention he did everything else in his life. Anything that could help him keep control, he'd adjust accordingly. ]