If you have a corn sensitivity or allergy, what brand and product of Magnesium supplement do you tolerate?

Except for Magnesium Oxide and Magnesium Chloride, many of the magnesium supplement compounds have some kind of organic molecule that might be corn-derived (likely in the USA because corn is cheap), for example Mg citrate, Mg malate, etc.

I found I'm sensitive to a lot of these options. And unfortunately, Mg Oxide and Mg Chloride are poorly absorbed and easily cause diarrhea.

Is there a specific product from a brand that you tolerate well?