Magnesium citrate used in large amounts is a laxative.
It is used to prep for some X-rays...but now that we have the PeG type it is less common. It is still sold in drugstores on the shelf in a glass pop bottle -- called Citrate of Magnesia
People vary in response to magnesium products. Really slow movers can tolerate more magnesium citrate than others with fast transit. It is a personal thing. So when used in small amounts some mag will be absorbed into the blood stream.
The whole idea for magnesium supplements is to have the best absorption as possible, since this mineral is so critical for the body, and 7 out of 10 Americans are deficient.
For laxative action, absorption is not the goal.
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Weezie looking at petunias 8.25.2017
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