I'm not Dr of course and don't know if asking about vitamins is considered medical advice but me personally I take a B12 vitamin everyday. Don't know if it does anything but it may just have a placebo effect. It took a long time for me to get energy back. Don't let that discourage you.... I was coping with some depression at the time and changed my entire life around so it was all a big adjustment. It just gets better and better.