How does magnesium citrate work?

Question

The bottle says "saline laxative", but how does saline make it do that?

Answer 1

Magnesium citrate works by attracting water through the tissues by a process known as osmosis. Once in the intestine, it can attract enough water into the intestine to induce defaction. The additional water also helps to create more feces, which naturally stimulates bowel motility. This means it can also be used to treat rectal and colon problems. [1] Magnesium citrate functions best on an empty stomach, and should always be followed with a full (eight ounce) glass of water or juice to help the magnesium citrate absorb properly and help prevent any complications. Magnesium citrate is generally a very unharmful substance, but care should be taken to consult with a health professional if any adverse health problems are suspected or felt.