I looked for a thread on Calcium, did not see one.

I was taking Cal-Mag-Zinc until mrsd enlightened me. I am now taking Zinc and Slow_mag, but just realized I have not taken a Calcium supplement for over a month now.

Suggestions as to which type of Calcium to take would be greatly appreciated. Dosage too.
I am 63, my weight is dropping rapidly due to a change in my eating habits and detoxing off the opiates. I am about 206 now and hope to make 180 within the next 6 months. Thanks to this forum I am taking an active role in my Vitamin/Mineral supplements.

It seems there are a few dozen types of calcium out there. My bones are sound and to my knowledge, I don't have any other indications of Calcium deficiency, and I would like to keep it that way. Suggestions?