@joanmperez, I follow the AlgaeCal suggestions, only with the Now Foods brand. I think it is cleaner without lead. The kind of magnesium in AlgaeCal, magnesium oxide can cause diarrhea. I take magnesium glycinate instead. This way, I take each supplement separately. No diarrhea.

I stopped taking the strontium, because it is heavier than calcium, so interferes with DEXA results. I do wonder, though, if it might help bones.