Better to do a blood test to find out how much you already have it on your blood level. Recent my blood test showed I only have 15 which is very low so, the doctors advised me to get vitamin D for next 4 months. If you are living in a sunny place then you don't have to worry about too much cos, you can get vitamin D free supply from sunshine.. <br />
There are some disadvantages too, please have a look at this site when you have few mins.. <br />
If there is no pain associated with it then a visit to a chiropracter or a good masseur/masseus (damn my spelling) might be a better idea.. IF there is no pain it's probably just joints popping, like cracking your knuckles, some decent exercise would sort that out to build up the intercostal muscles supporting the joints.
cod liver oil 2 table spoons a day get mint flavor as plain taste like caca
I take 5000 units of Vit. D
Your skelington may need oiling take an omega oil or ginko biloba to reduce inflamation good too, dont take both, it can make your blood too thin.