Magnesium is principally absorbed within the small intestine , although some can also be taken up by way of the big intestine . Two transport systems for magnesium within the intestine are known (as discussed within the article by de Baaij et al. in this supplement). The majority of magnesium is absorbed within the small gut by a passive paracellular mechanism, which is pushed by an electrochemical gradient and solvent drag. Of the total dietary magnesium consumed, only about 24–76% is absorbed within the intestine and the remainder is eradicated within the faeces . It is noteworthy that intestinal absorption just isn’t immediately proportional to magnesium intake but relies mainly on magnesium status. The decrease the magnesium stage, the extra of this factor is absorbed within the gut, thus relative magnesium absorption is excessive when consumption is low and vice versa.
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