I've read the thread from Wisconsin Ann about energy levels and possible link to B12 deficiency. The symptoms were very familiar and I decided to try B12 supplement. I started with one Friday night, another Saturday morning and a third this morning. Friday and Saturday I was feeling fatigued, but today I was feeling much better. Is it possible that this supplement could already have an effect on my energy level? It doesn't seem plausible to me, although I'd love to have that easy a solution.