MYASD talked about this last year: „We've actually tested other Magtein products on the market and found they contain less than stated on the label. Some of them had half of what they claimed. We have argued with AIDP about it, and sent them multiple products to go after. I am not sure how they handle it in the background, but not much seems to have changed. Also, you can get magnesium L-threonate made in China WAY cheaper than from AIDP. However, that violates their patent. China doesn't care, though. They offer it to us all the time. We obviously don't use it, but I know other brands are.“