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Dr. Bob is Robert Hsiung, MD,
bob@dr-bob.orgShown: posts 1 to 7 of 7. This is the beginning of the thread.
Posted by gardenergirl on August 21, 2004, at 8:06:04
Hi all,
I am currently taking 500mg of magnesium oxide per day. I remember a neuropsychologist I worked with, who also is a PhD in physiology or pharm.D (I forget...very smart man) said that too much magnesium could lead to loosening of the joints. Anyone know about this? And how much is too much? Wish I could have asked him then, but I think it was an in-passing conversation.Thanks,
gg
Posted by Larry Hoover on August 21, 2004, at 9:06:06
In reply to magnesium and joints, posted by gardenergirl on August 21, 2004, at 8:06:04
> Hi all,
> I am currently taking 500mg of magnesium oxide per day.Magnesium oxide is the least effective source of magnesium of them all. It is actually so poor, it stands quite apart from the rest. The chemical formula can be represented as Mg=O. That's a double bond to a single oxygen atom. Oxygen atoms do not dissolve, and thus, the magnesium cannot either. The only way to get them apart is a multi-step chemical reaction that consumes stomach acid (mag oxide is an antacid), and the bioavailability is only about 18%.
> I remember a neuropsychologist I worked with, who also is a PhD in physiology or pharm.D (I forget...very smart man) said that too much magnesium could lead to loosening of the joints. Anyone know about this?
Loosening of the joints? I think you maybe remember it backwards?
Joint laxity is caused by magnesium deficiency. Joint tension is maintained by ligaments, and ligaments have their elasticity due to chelation of magnesium ions on the surface of the proteins called elastin.
Too much pretty much can't happen, unless your kidneys do not work properly.
> And how much is too much?
There is too much in the sense of digestive disturbance. Too much dissolved magnesium ions in the gut pulls water out of the intestinal wall, diluting the contents, and causing diarrhea. If you're already magnesium deficient, this is actually more likely to occur. Tolerance will build, if you cut the dose a bit, and wait a while, before increasing it back up again. You also need vitamin D (85% or more of North Americans are vitamin D deficient....rickets is on the increase in North America, despite fortification of dairy products).
> Wish I could have asked him then, but I think it was an in-passing conversation.
>
> Thanks,
> ggWhy are you taking magnesium, if you fear it might be risky?
Lar
Posted by gardenergirl on August 21, 2004, at 12:10:12
In reply to Re: magnesium and joints » gardenergirl, posted by Larry Hoover on August 21, 2004, at 9:06:06
Thanks for the response. Actually, I was trying to make sense of what he said in my mind, so if I am remembering it wrong, then it makes a lot more sense now. I don't really think taking magnesium is risky, although I am not usually one to take a lot of supplements. I take the magnesium because I also take 1200 mg of Calcium, and I understand they should be roughly 2:1.
Sounds like I need to look for a different magnesium source.
I get Vitamin D both in my Calcium supp. and in my pre-natal vitamins for a total (besides food intake) of about 600 daily. My vitamin insert doesn't give an RDA. Is this adequate?
Thanks,
gg
Posted by Larry Hoover on August 22, 2004, at 10:26:51
In reply to Re: magnesium and joints » Larry Hoover, posted by gardenergirl on August 21, 2004, at 12:10:12
> Sounds like I need to look for a different magnesium source.
Most likely, yes.
> I get Vitamin D both in my Calcium supp. and in my pre-natal vitamins for a total (besides food intake) of about 600 daily.
You are with child! Congratulations. I think pregnant women are the most beautiful of all.
> My vitamin insert doesn't give an RDA. Is this adequate?
>
> Thanks,
> ggNot if you're preggers. The RDA is currently being revised upwards, by the way. 20,000 IU is now considered safe, whereas before it was once thought of as toxic. That said, I'd put your daily intake recommendation (from supps) at 1200-1800 IU. There is no risk of adverse effects at that dose, and you will ensure adequate mineralization of the fetal skeleton.
Lar
Posted by gardenergirl on August 23, 2004, at 9:58:42
In reply to Re: magnesium and joints » gardenergirl, posted by Larry Hoover on August 22, 2004, at 10:26:51
Oops, I should have been more clear. I'm on the pre-natals to get enough folic acid. They are prescribed by my gynecologist as I am child-bearing age and could get pregnant.
But thanks for the congrats and the info. I'll definitely file it under "when the time comes, whenever that may be, God willing."
Warmly,
gg
Posted by tealady on August 25, 2004, at 9:36:01
In reply to Re: magnesium and joints » Larry Hoover, posted by gardenergirl on August 23, 2004, at 9:58:42
have a read of this thread on Magnesium
http://forums.about.com/ab-thyroid/messages?msg=30674.1 (I'm lazy)http://forums.about.com/ab-thyroid/messages?msg=37976.22 too much magnesium...what it does and why it's used..like in preterm labour..yes ..it IS a muscle relaxant ..*grins*
Also read up on pregnancy and thyroid..Mary Shomon's site ha a lot of good info on it.
There ya go (I just did a search..585 hits just on the site home, lol)
http://thyroid.about.com/sitesearch.htm?terms=pregnant&SUName=thyroid&TopNode=3902&type=1
It's something she personally went thru. Too low/ high level affects your babies IQ, may cause you to lose the baby etc...and you need to adjust your meds as the pregnancy progresses and monitor closer than normal....not a time to try adding in 25mcg T3 then stopping etc<g>
BTW being a tad hyper will stop you getting much sleep, and one of reasons I did mention quickly getting some magnesium is that it IS a muscle relaxant (not strong unless taken by IV in large doses)...magnesium may help prevent/lessen those "thumpies" which one can get with overhigh FT3 (which luckily you didn't get)Best wishes, Jan
Posted by gardenergirl on August 25, 2004, at 10:41:49
In reply to Re: magnesium and joints, posted by tealady on August 25, 2004, at 9:36:01
Hi,
Wow, great research...thanks. Wanna help with my dissertation? ;)Actually, I posted above to lar...I'm not pregnant. I take the prenatals as prescribed by my OB/GYN to make sure I am getting enough folic acid among other things. But I will keep all this in mind for when I do, hopefully, someday get pregnant.
Also, I do get the thumpies...hate those!...from Nardil. So good to know that something helps them. They can be really frequent and intense on the Nardil. Soon as I finish up all the mag oxide I have (thrifty, just can't toss it), I'll look into getting a better version. Be nice to relax a bit more.
Thanks again!
gg
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