As others have noted, protein and fat are metabolically useless during exercise and protein actually requires calories and some excess blood flow to the gut to digest. They may taste good, but rarely do so in bar form. Stop for a nice sandwich or a slice of pizza if that's what you want.

Electrolytes are also pointless on the bike, except for sodium in the presence of multi-liter fluid loss and replacement on long, hot rides, but I don't expect anyone to believe that.