The most common magnesium supplements are magnesium oxide, magnesium carbonate, chelated magnesium (magnesium glycinate), magnesium orotate, magnesium citrate, magnesium maleate and magnesium gluconate. These supplements provide different amounts of elemental magnesium (the constituent that matters) and also vary significantly in their bioavailability (absorption).
Magnesium oxide is the most dense magnesium compound and the one most often used in mineral supplements and multivitamins. It contains 300 mg of elemental magnesium per 500 mg tablet, but is extremely poorly absorbed. Only about 4% of its elemental magnesium is absorbed or about 12 mg out of a 500 mg tablet.
Magnesium carbonate contains 125 mg of elemental magnesium per 500 mg tablet, but is poorly absorbed.
Chelated magnesium (magnesium glycinate) is magnesium bound in a complex of glycine and lysine. It is easily absorbed and highly bioavailable. The magnesium (elemental) content per tablet or capsule is usually 100 mg.
Magnesium orotate contains only 31 mg of elemental magnesium per 500 mg tablet. However, it is well absorbed and has been found highly effective in daily intakes of 3000 mg (186 mg elemental).
Magnesium citrate contains 80 mg of elemental magnesium per 500 mg tablet. It is far better absorbed than is magnesium oxide. The water soluble form (Natural Calm) contains 205 mg of elemental magnesium per teaspoon, is totally soluble in hot water and is highly bioavailable.
Magnesium maleate contains 56 mg of elemental magnesium per 500 mg tablet.
Magnesium gluconate contains 27 mg of elemental magnesium per 500 mg tablet. It is easily absorbed and quick acting.
All forms of oral magnesium supplements are better absorbed when taken with a meal.
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This product is excellent in purity and potency. This form of magnesium is super absorbable and so it increases bioavailability of the mineral. Go with the citrate form, or other water soluble higher molecular weight forms such as asparate, to ensure high bioavailability. Magnesium oxide, although the most inexpensive form, is poor in terms of potency. I've been useing this product for years and love it. Magnesium is essential for so many enzymic biochemical reactions and maintaining a healthy heart rhythm.Read Best Reviews of Solgar - Magnesium Citrate, 120 tablets Here
I know it may seem like a very unpleasant topic to talk about, but constipation can be a very serious and painful ailment. I have suffered for year. Doctors tried all kinds of pills, laxatives, fiber powders, colon products and cleansing, etc. There was just no success. Finally I found a brilliant doctor who guessed that I might have a Magnesium Deficiancy...I know, I'd never heard of it either. Well, he performed what I thought to be an extremely unusual (though incredibly helpful in diagnosing my ailment) test: He had me swallow this little device/detector thingie :-/ that fit inside a quickly dissolving gel capsule. Also inside the capsule was a thin string which was attached to the device (so he could later pull it right back out through my mouth when the test was done). I then drank something, I believe (it's been several years since the test, so I don't remember exactly) with magnesium in it. Soon after, I drank something with Baking Soda in it to see how fast my stomach could absorb/neutralize acid (again, it's hard to remember the exact things I drank). While the device was in my stomach, the doctor could see how well I absorbed Magnesium -quite poorly, as he suspected. He also explained that if your body cannot properly absorb magnesium from foods, it can impact your ability to have bowel movements. Needless to say, this discovery has been a godsend! These pills work wonderfully. I do have to take 2 3 every other night though. I hope someone might read this review and discover a way to cure their constipation as well. Please do talk to your doctor about it though as I have no medical training; I only know what is working for me.My naturopathy doctor highly recommended Solgar. She said they have exceptionally high quality products and she recommended I take Solgar Magnesium Citrate along with Solgar Calcium Citrate because the magnesium citrate would speed the absorption of the calcium citrate.
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