Go to the vitamin section in your grocery store, and look for a small dropper bottle of b12. It should say sublingual complex on it.

In other words, its a liquid form of b12, which is super responsible for your energy levels. Its easy to take, just drop one dropper full under your tongue, hold for a few seconds, and then swallow. Boom! Energy levels are back! You just take it once a day, and it will slowly help build back your bodies stores of it.