Are you taking tablets or liquids, even gel caps based on inorganic magnesium from crushed rocks? Recent studies suggest these have an absorption of 2 to 15%, in general.
Mg salts were originally used as antacids and laxatives and Mg-citrate is still administered before a colonoscopy to provide a ‘clearer view’ of the bowel and intestinal walls.
We evolved with foods delivering our magnesium and the mineral was not unaccompanied but delivered along with a host of other active trace elements eg Mn, Fe, Cu, Zn, Se and more.
Try the effects of magnesium from wholefoods in a blend scientifically formulated with complementary active minerals, indigenous Australian functional foods, mushroom powder (vitamin D) and more.