frontpageNavy-Wife | Staff posted Yesterday 07:47 AM
Item 1 of 5
Item 1 of 5
frontpageNavy-Wife | Staff posted Yesterday 07:47 AM
Select Prime Member Accounts: 90-Ct Sports Research 160mg Magnesium Glycinate
& More w/ S&S + Free S&H$8.80
$18
51% offAmazon
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For Sports Research Magnesium Glycinate, the evidence points toward it being a true magnesium glycinate chelate rather than a buffered glycinate heavily diluted with magnesium oxide.
The key clue is the ratio on your label:
- 1,441 mg magnesium glycinate chelate
- 160 mg elemental magnesium
- = 11.1% elemental magnesium
Buffered magnesium glycinate products that contain substantial magnesium oxide usually have a much higher elemental magnesium percentage because magnesium oxide is about 60% magnesium by weight. For example, a product containing significant oxide might provide 200–300 mg magnesium from only ~500–800 mg of material.Sports Research instead requires 1.44 grams of chelate to deliver 160 mg magnesium, which is consistent with a relatively low-magnesium, amino-acid-chelated material.
A few additional observations:
- Sports Research states that the product uses magnesium glycinate chelate and is not marketed as a "buffered" glycinate.
- The label does not list magnesium oxide separately, which it generally would if it were being added as a distinct ingredient.
- The 11.1% magnesium content is actually lower than the theoretical ~14% for anhydrous magnesium bisglycinate, suggesting the raw material likely contains additional glycine, water, or other components of the chelate matrix rather than oxide.
Best estimateBased on the label and the product's positioning:
- Magnesium oxide, if present at all, is probably a very small fraction of the total magnesium.
- I would not assume any meaningful amount of the 160 mg comes from oxide.
- A reasonable working assumption is that nearly all of the 160 mg elemental magnesium is coming from glycinate-chelated magnesium.
One caveat: supplement labels in the U.S. don't require manufacturers to disclose whether a chelated mineral raw material contains a small amount of residual oxide used during manufacturing. So it is impossible to prove the oxide content is exactly zero without a certificate of analysis from the manufacturer.For practical purposes, however, Sports Research Magnesium Glycinate appears much closer to a fully chelated glycinate product than to the inexpensive "buffered glycinate" products that rely heavily on magnesium oxide.
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