American Standard Supplements Magnesium Glycinate 575mg per Serving, 90 Veggie Capsules, Magnesium Supplement for Bone & Muscle Health, Chelated f...

Unfortunately, published data from reliable sources seldom agree when it comes to magnesium (Mg) requirements for humans -- Daily Values (DV), Recommended Daily Allowances (RDA), and/or upper limits (UL). Adding to the confusion is that these sources usually do not specify whether their numbers are referencing supplemented Mg quantities or total intake from all sources or whether they specifically refer to ELEMENTAL Mg or not. For magnesium, Harvard lists a DV of 310-420mg, depending on age and sex but they list a UL of 350mg from supplements alone. The American Academy of Family Practitioners states that 350mg UL is for ELEMENTAL Mg. The labelling on this American Standard Supplements Magnesium Glycinate (asin=B0BK3HH3GH) states there are 575mg of Mg from magnesium glycinate in the two-capsule serving. Only if you go to American Standard Supplements website will you see them list that as ELEMENTAL magnesium. However, online sources state magnesium glycinate is 14% ELEMENTAL magnesium and 14% of the 575mg would equal 80mg of ELEMENTAL magnesium. To really try to figure this out, I emptied out two capsules and weighed them on my milligram scale. Total mass for the powder in 2 capsules was 1766mg. Assuming it was all magnesium glycinate (and it's not, according to the list of "other ingredients"), 14% of 1766 comes out to an ELEMENTAL Mg content of 247mg. So, my investigation using numbers from trusted online sources in addition to those listed on this product leads me to 3 different quantities for the amount of ELEMENTAL Mg in two of these capsules -- 575mg, 80mg, or 247mg. I NEED a magnesium supplement for bone growth. I WANT one in the 200+mg range for ELEMENTAL Mg. I seriously doubt this product has 575mg worth, but I would sure like to know whether the 80mg or 247mg is closer to the truth. Another magnesium glycinate product available on ZeeBooth (ASIN = B0C8DMMYTC) specifically states content of 70mg as the amount of ELEMENTAL Mg in their 500mg capsule of magnesium glycinate. I cannot make a valid comparison regarding cost of this product versus another unless the seller provides more accurate information on the bottle, on their website, on the ZeeBooth listing, or in reply to this posting. [*** 3-13-24 edit ***] I just learned of a 2023 class action lawsuit against the Qunol brand for magnesium glycinate capsules whereby the plaintiffs are asserting the exact same claims as my review questions in the above paragraphs. The FDA requires that the amount listed on the "Supplemental Facts" label reports the ELEMENTAL amount of magnesium -- not the total amount of magnesium glycinate (or other compounds). You can easily do a Google search for the details of this lawsuit. *** 3-13-24 edit #2 *** This seller now includes additional numbers on the "Supplemental Facts" label in addition to naming the product magnesium glycinate "chelate." Once again, however, the 1400mg listed for magnesium glycinate chelate should yield only 196mg of ELEMENTAL magnesium (14% of 1400).

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I was feeling extremely tired and my whole body was hurting. By the third day I had no pain. Take as directed.

Worked fast to relieve leg cramps!

This is a chelated magnesium glycinate, 575 mg, which is apparently the best kind. I use magnesium primarily for leg cramps. I haven't had any since i have been taking this brand. That may or may not be causal. The capsules are large and a little hard to swallow. I think the price is a little high. But overall these are effective magnesium.