I have always taken calcium for my bones. In my late 60's my Dr. told me to stop taking calcium because I had to much in my system. This is when I found out about this Bone Support. It does have some calcium, but very little. I take 2 at night so not to mix them with other herbs and vitamins I take. At age 72 my bones seem to be strong and not brittle. I walk 3 miles 5 days a week, use my rower, and do some yoga. My height is still 5'7". So thank you Advanced Bionutritionals.