I must apologise for not being on NOF for some time. It was only because I had nothing of importance to add, and there were already persons with very good knowledge writing here.
However lately I have woken up to the fact that lots of people are taking Magnesium up to 300 mg or more these days for better health. Yet when I go to study any site on Magnesium -- and in fact even when I look at the various drug advertisments on Magnesium, one thing worries me, even for small amounts like 100 mg or 160 mg.
Almost all of the drug companies say that Magnesium should not be taken by people who have any degree of kidney trouble. There are even sites that say that Magnesium can be bad for the elderly whose kidneys are functioning slowly.
And there was even a site which said that Magnesium could even harm a healthy kidney and cause it to go into failure. This is because Magnesium is one of those substances that needs to pass out through the kidneys -- and if the kidneys are not doing a good job it can accumulate there.
This means that every time we start Magnesium, or have been taking Magnesium for some time, we must get our kidneys checked for creatinine and creatinine clearance and glomular filtration rate GMR -- in other words we must get our kidney functions checked, before and after starting Magnesium.
This seems alarming to me. Because I am not accustomed to getting the kidneys checked each time I start any supplement. I suppose ideally we should all get kidney functions tests done before we embark on any multivitamin mineral tablets. Kidney disease creeps up on a person insidiously, he does not know that he has it till the symptoms become pronounced, like swelling in the face and legs etc. Even a small thing like a urinary infection is enough to start off a kidney infection, and many people are not aware of it till in the late stages.
So -- the question arises, no matter how great the benefits of supplements to the health and the bones, we have to consider the damage that they can do to the kidneys -- something that can be irreversible. Having a kidney transplant does not appear to be a very palatable alternative. And if one is forced to do that just for the nebulous "benefits" of the supplement it would be quite tragic.
It is indeed good that the manufacturing companies have themselves stated the dangers of Magnesium to the kidneys. So should we be taking it at all as a supplement in the form of a tablet at doses of even 100 mg far less 300 mg and more?
I suppose members on NOF would best be able to explain the situation if they have been taking Magnesium themselves in large quantities over 100 mg. How many people got their kidney functions tested before and after starting Magnesium?
Best wishes and warm regards,
Yours, as ever,