Hi, I've been having very low energy and tiredness for sometime now, I also have a bad lower back pain. In the center of my back. If I sit or stand for an extended time. For the past few months my right elbow hurts. Something similar to tennis elbow, also my right knee started to hurt everytime I bend my leg. Generally I don't feel at my optimal energy and strength.. I was wondering if taking some multivitamins or supplements would help. I would like to know which ones to takes? Thank you Regards Paul