It is almost impossible to give too much magnesium. The worst that happens is the intestines let loose unless the patient is experiencing late stage kidney failure. Cancer patients want to take magnesium orally with daily massages, magnesium and bicarbonate baths and by taking different forms orally.
Another reason, not mentioned above is that magnesium is exceedingly important for proteolytic enzymes, which counteract the inflammation, and things return to normal. That’s why a sprained ankle as a young child heals within a few weeks at most, but can take six weeks or more for an adult of say 45. The problem is, after around age 25, our production of these enzymes drops off almost completely so there is nothing to tell the body to stop the inflammation.
These enzymes are also responsible for cleaning the blood, fighting off viral and bacterial infections and breaking down excess fibrin (scar tissue). Most if not all of these enzymes are mediated by magnesium meaning as magnesium levels drop off so do the activities of these crucial biological magnesium sensitive enzymes. Enzymes are very important in inflammation and enzymes bring us back to their fundamental supporter, which is magnesium.