I'm having a hard time losing weight (need to lose about 140 pounds) and I know my Vitamin D levels are low - according to my rheumatologist they are at about 21 which he said was pretty low. I'll see my diabetes doc next week and he is supposed to address the low Vit D. As of today I had lost 2 pounds in a month. I've been gaining and losing 2-3 pounds the entire time. Today I'm cutting back on cards even more to the Berstein levels of 6-12-12 and I'm going to see what happens now. But I was wondering if anyone has any experience with low vit D and its affect on their weight loss.