Source for Magnesium Oxide

Looking for a good source for MgO, all I can seem to find is bulk supplements. I suppose food grade makes sense, anyone have any input?

Magnesium Oxide, Laboratory Grade, 500 g

youll find alot of cut in suppliment bags

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I had a feeling that would be the case, I found some that claimed to have no cut, but, I really wanted something Lab Grade, many thanks.

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You’re very welcome. Although, can you elude to the product claimed to be no cut? A link preferably? Thankyou!

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