It's not usually due to something as serious as cancer.....I live in Oregon and was told that it's due to the latitude and longitude of where I live as well as the lack of sunshine here........and a poor diet. The supplement pills had no noticable side effects and corrected my level in 12 weeks. I've had to repeat the treatment about once a year though. I think one thing that can be problematic is if you need surgery......they don't like you to lose much blood when you're level is that low and may need to do blood transfusions. I wasn't to keen about that and delayed my surgery until my level was higher. I guess if it was emergency surgery you wouldn't have that option so it's best to just stay on top of it and keep your level up.
No. Speak to your doctor about a supplement. I also have low Vit D and I have cancer.
No, that's way too low. You need prescription supplements. OTC won't correct numbers that low....what did your Dr. say? If they said you didn't need help, find another doctor.