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Thanks so much for your replies..                                             
                Magnesium aspartate is an organic salt of bioavailable
magnesium and the amino acid aspartic acid. Aspartame, commonly known as
NutraSweet® brand sweetener, is a combination of the amino acids aspartic
acid and phenylalanine. Therefore, they both contain aspartic acid if that
is the person's concern. 

I searched google and found that aspartate is in the same family as MSG and 
that celiacs are sensitive to it. I don't know if I am but evidently I am coz 
I do not eat anything with aspartate, MSG or aspartic acid and certainly no 
aspartame. Gee, you learn something new every day, I've been on this diet for 
30 years. I am more intolerant than I thought as I grow older.

More about Magnesium
Forms of Magnesium
After looking into magnesium for months, what I came away with is that 
magnesium comes in two types: 
- soluble forms/organic (aspartate, malate, glycinate, citrate and succinate 
- insoluble forms/inorganic salts (chloride, carbonate, oxide). 

Overall, the chelated magnesium and magnesium glycinate are often referred to 
being very absorbable.

The soluble ones are pretty equally absorbed and as a group are much better 
absorbed than the insoluble group. Of the insoluble group, the oxide is the 
best absorbed. The insoluble group is far more likely to cause loose 
stools/diarrhea than the other group. If magnesium nutrition is what you 
go for the soluble group. If constipation is the issue, then some insoluble 
forms are okay. The loose stool effect (if not wanted) can be minimized by 
taking the magnesium with food. 

Most of the products I saw on the shelves at the store were a mixture of 
magnesium types. Sometimes I would see a bottle of a specific type of 
magnesium, such as Magnesium Citrate. But the ones marked just Magnesium were 

usually a mixture. And some had as many as 4-5 different types in the 

Although I have spent some time looking at magnesium sources, there seems to 
varied opinions. Here is a reputable source from a book on nutrition:

"Magnesium chelated with amino acids is probably the most absorbable form. 
absorbable forms include magnesium bicarbonate, magnesium oxide, and 
carbonate. Magnesium oxide is probably somewhat better than magnesium 
(dolomite). The newly available salts of magnesium aspartate or citrate, both 

known as mineral transporters, have a better percentage of absorption." 

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What chelate form means:
"Magnesium Chelate (Amino Acid): A chemically reacted magnesium ion, bound to 

1 or more amino acids, thus allowing the magnesium to enter through the 
intestinal wall via the amino acid pathway rather than active magnesium 
diffusion. A true reacted chelate differs from simply mixing the amino acids 
and minerals which is often referred to as "chelated"." 

Sources of Aspartate, aspartame and aspartic acid
 Aspartic acid, found in aspartame (NutraSweet) ordinarily causes MSG type 
reactions in MSG sensitive people 
 Aspartame (Nutrasweet), aspartic acid,aspartate are used to sweeten many 
prepared foods, as a tabletop sweetener, sources include: 
 cocoa mix, topping mix 
 yogurt-type products 
 shake mix 
 gelatin mix 
 instant breakfast mix 
 frozen novelties 
 milk flavor additives 
 wine coolers 
 chewable multivitamins 
 carbonated soft drinks 
 fruit syrups 
 powdered soft drinks 
 puddings and pie fillings 
 fruit juice drinks 
 instant coffee and tea mixes 
 refrigerated tea 
 ready-to-eat gelatin 
 chewing gum 
 frozen desserts 
 refrigerated flavored milk beverages 
 breath mints 
 over-the-counter pharmaceuticals 
 fruit spreads & toppings 

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