Thank you, Mrs. D. I will stick with the product that we are using since my son has not had any intestinal distress, and he doesn't mind taking it. I'm not sure if it is as effective as his previous Mag/Cal supps however, he is much more compliant with this. I'm also curious as to the effect of pH. I understand that Mg can be very alkaline. Can this have an adverse effect on digestion?

Laurie