@teb I was looking up Calcium for my osteoporosis & saw this collogen product. Do you take calcium as well? I have had osteoporosis since I was 30, thats 34yrs & have refused all the drugs after taking Fosamax for 1yr, until I read about all the s/e from these drugs. I read they only make a change for so many years so you have to keep using different drugs. I did not like what they did to the jaw bone either.