Eriksgirl has been taking an iron vitamin with her pregnancy that includes B12. After taking the vitamin she notices a burst in energy levels. Out of desperation one day, and not wanting to take a Provigil, I tried one of her iron/b12 pills to see if it would help my fatigue. It worked surprisingly well, and then continued to work well on successive days. Since I do not need the iron I decided to switch to the B complex vitamin. I also decided to go with the B-100 complex (over the B-50) to get the maximum bang for my buck (Eriksgirl’s vitamin has 15mcg of B-12 and the B-100 has 100mcg – I was a little afraid it would be too much). I have been extremely pleased with the outcome! I take one vitamin in the morning, and then if I start dragging take another pill in the afternoon. It has not completely weaned me off of the Provigial, but it has radically reduced the days that I take Provigial. Most importantly, the B-100 has been side effect free (well unless I take it on an empty stomach; which can result in some pretty nasty burps!) and will definitely be something that I continue taking. Plus $5.00 for 100 B-100 vitamins is a ton cheaper than 30 Provigil!