The tablets are fragile, I chew at night with vitamin D. At first I forgot that calcium is definitely needed magnesium. As a result, I got constipation, pain in the right side and back (usually the back does not hurt) .------- As soon as I added MAGNESIUM IN THE MORNING (powder from California, only 200 mg) - everything was fine! ---- --- THE RESULT OF TAKING ONE CAN OF "Catalo Naturals, Women's Calcium, Bone & Joint Support" + "Chondroitin-Glucosamine Prince of Peace" + "Sulfur Ohio": when taken, the lower back immediately began to hurt, it was impossible to straighten out (usually it never hurts) ... From the positive results - the crunch in both shoulder joints decreased slightly. But: the left shoulder, which 5 years ago underwent a complete dislocation twice and recently I have already forgotten about it, after a month of taking this calcium, I SUFFERED TO SWIFT IN THE MORNING JUST IN THE BED! -------- This expensive calcium is no longer buy, as well as "Chondroitin-glucosamine Prince of peace". But the Romanian pharmacy "Traumaflex" 2 packs is a thing.