[adrianmonk]

> I assume this is why magnesium salts act as laxatives

This is a side issue, but apparently it's a different reason.

From https://ods.od.nih.gov/factsheets/Magnesium-HealthProfession... : "The diarrhea and laxative effects of magnesium salts are due to the osmotic activity of unabsorbed salts in the intestine and colon and the stimulation of gastric motility."

[azeotropic]

Sounds like it's only part of the reason, if I'm correctly parsing "... and the stimulation of gastric motility" as a second mechanism of action.

[adrianmonk]

Oh, good point. I was reading it as if it said "the resulting stimulation", but what you're saying makes more sense.