Quote:
Originally Posted by Montezuma_Tuatara
The physiology of ester c is that for you to get to bowel tolerance you will have to take twice as much, and the mechanics of that is that the calcium is sheared off of the ascorbate, but for the ascorbate to be absorbed the body utilises localised sodium from any source nearby, to split the ascorbate into two molecules, one which the body uses, and the other which is excreted. BUT, before the ascorbate is utilised, the body uses some of it to chelate out the calcium, which when free in the body is dangerous to the body.
Ascorbate is split in two by sodium.
One part is excreted, one used.
If you use calcium ascorbate, the calcium shears off.
The ascorbate picks up sodium to split so it can be used.
But because calcium shouldn't be there in the free form, some ascorbate is used to take the calcium out the body.
This leaves you with about half the amount of ascorbate you put in originally.
If you used sodium ascorbate your body could use all of the ascorbate.
So by using calcium ascorbate, in order to get as much as you would need by using sodium ascorbate, you have to take twice as much.
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This is the post I am saying is full of scientific inaccuracy. I'm hoping MT will read this and tell me where she got the info. WHoever gave her this info is wrong.
Only the L-enantiomer of ascorbic acid is used in the body as vitamin C. THis means that half of ALL ascorbate will be used as vit C, and the other half will be discarded. It doesn't matter which mineral salt it is found as before you take it, even w/ SA, only the L-enantiomer can be used. The D-enantiomer will not. D and L enantiomers are mirror images.
Calcium will NOT be "sheared" off of the molecule b/c ascorbate is an ion. Sodium ascorbate is the sodium salt of ascorbic acid. In solution (dissolved in water) the mineral (positive ion Na+, Ca++) is not attached to the molecule. Once they are in solution, the ascorbate from SA and from Ca asc are identical. That's why I was so confused by this, and I wasn't sure where the sodium came into play.
There were some other posts on that thread trhat made more sense. And now that I have spent a couple of hours readig up on vit C and ascorbates, I think I understand it. It's not that sodium is better per se, it's just that too much calcium is definitely bad for most people. I get that. But I think regardless, if someone takes a bunch of sodium OR calcium ascorbate, they need to make sure their intake of magnesium and potassium is good as well to counteract that. THat makes sense. I think I get it.
And since I feel I need to have some extra calcium anyway (which I only feel like I need when I'm nursing, and I am currently nursing 2 babies--I go by how I feel, not by some subjective RDA) I think I will just stick w/ the Ca asc or Emergen-C and make sure to remember my magnesium before bed.