Ergocalciferol
vitamin d deficiency
"I have seen a lot of bad reviews for this pill.. And I've only just started taking it.. Taking my first one last night.. But so far, I have zero aches and pains in my joints and bones. It had gotten so bad that I couldn't sleep at night or sit or lie down without being in severe pain. I don't feel a ton of energy as some people have stated but it's only been one day.. I haven't had any side effects and I overall feel much better. I'm looking forward to the next six weeks to finally feel normal again. :)"