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In that case take half a modafinil and a bunch of bananas an hour before your ride. Then half a shot of whatever spirit you like just before you leave the house.
While riding drink those high carb drinks to keep your sugar levels high.
Re vitamin B, it's probably easier just to take half or a quarter of a ultra high dose vit B tablet each day. Unless you are actually deficient, in which case see your GP.
definitely not x2