hi lit love. thanks for posting about vit d. i have been taking vit d for over a year now after my dr found out through bloodwork that my level was about a 9 when it should be around i think 30 to 50. he said i had the lowest level he ever saw. lack of vit d can cause bones to start deteriorating and pain when trying to walk or exercise. since i don't go out much in the sun anymore because it causes my rsd to flare up, i have been taking vit d supplements. i am still not at the level i should be but am getting there. i think last my dr checked i was at level 19. anyway, thanks for posting. its good to know it is a mood booster too since i am battling with depression as well as pain.