If I currently take a supplement with 600mg magnesium oxide and 600mg malic acid, am I looking for an equivalent amount of magnesium malate/malic acid to replace it with? Some supplements have a 4:1 ration of malic acid to magnesium malate.

The only company I can think of that sells just magnesium malate and malic acid together is Source Naturals.  I think they make two different milligram amounts.

Does it matter if you take capsules or the powdered form?

No.  The powder would be cheaper though, and I like the taste of magnesium malate.

Is magnesium oil better in any way or for any particular circumstances?

The reason I prefer the magnesium malate is because both the magnesium and the malic acid increase ATP levels.  Magnesium oil will supply magnesium for ATP formation, but not the additional ATP former malic acid.  Therefore I see more benefit from the magnesium malate.

Thank you.

ps Do you see clients or do phone consults?

Yes, both.