why is it that epsom salt baths are safe then?
I don't think there's any scientific proof that it absorbs topically (never felt anything from epsom salt baths), also, you can put lots of stuff in there, like take a plant oil bath and be fine, but try to inject it and that might result in departure to the other side. Oral magnesium is well absorbed, not sure why you need an iv injection, maybe it's justifiable when someone's severely deficient which is rare. Quick google search gave me these warnings regarding iv mg:
WARNINGS
Magnesium sulfate (magnesium sulfate (magnesium sulfate injection) injection) should be given very cautiously in the presence of serious impairment of renal function since it is excreted almost entirely by the kidneys.
The principle hazard in parenteral magnesium therapy is the production of abnormally high levels of magnesium in the plasma. Such high levels may cause flushing, sweating, hypotension, circulatory collapse and depression of cardiac and central nervous system function. The most immediate danger to life is respiratory depression.
During the period of parenteral therapy with magnesium salts, the patient should be watched carefully. A preparation of calcium, such as the gluconate or gluceptate should be at hand for intravenous administration as an antidote.
In the presence of severe renal insufficiency, no more than 20 grams of magnesium should be given within a forty-eight hour period. In eclampsia, however, renal function is not seriously impaired and magnesium may be more rapidly excreted.
This product contains aluminum that may be toxic. Aluminum may reach toxic levels with prolonged parenteral administration if kidney function is impaired. Premature neonates are particularly at risk because their kidneys are immature, and they require large amounts of calcium and phosphate solutions, which contain aluminum.
Research indicates that patients with impaired kidney function, including premature neonates, who receive parenteral levels of aluminum at greater than 4 to 5 mcg/kg/day accumulate aluminum at levels associated with central nervous system and bone toxicity. Tissue loading may occur at even lower rates of administration.
PRECAUTIONS
When barbiturates, narcotics, or other hypnotics (or systemic anesthetics) are to be given in conjunction with magnesium, their dosage should be adjusted with caution because of the additive central depressive effects of magnesium.
https://www.rxlist.c....htm#overdosage
Edit: about oral magnesium, forgotten to mention that magnesium sulfate is not the best choice as it acts a laxative and I don't know whether every epsom salt on the market is food grade.
Edited by spike, 18 December 2019 - 07:39 PM.