the best way to get magnesium (short of food) is transdermal magnesium chloride
(google it) you can buy nigari(which is magnesium chloride used in tofu making) at some asian markets and there are some online vendors, i get mine from herbalhut but im sure there are alternatives. transdermal mag chloride has completly rid me of my eye twitches and muscle cramps, plus i feel calmer.

Magnesium oxide is a very cheap form of magnesium to make, it bioavailability is very low ... mag chloride is a decent form of magnesium, and there are plenty of other forms that you body well may like (I know from experience that different forms of magnesium work for some and not others).

You may want to look at Ultra Mag from source naturals, also doctor's best has a magnesium that I think is called bioavailable or high absorption magnesium...

I like the previous testimony on the transdermal, never tried that

I have been prescribed (& have been taking) Magnesium Chloride- [Extended Release] 10Meq in Capsule form, 1-ea. twice a day. These were prescribed by my Cardiologist and his team. I have a rare form of Cardiac Amyloidosis [the ATTR version] In the process, I have had 2-Cardioversion, both of which have failed, and a Cardiac-Ablation that lasted merely 9-months. I've been on Eliquis ever since I was diagnosed with the Amalyoide issue some 2-years ago, and was recently placed on TIKOSYN when the Ablation was no longer controlling my episodes of A-FIB and Atypical-Flutter.

Recently I saw a Cardiologist @ the VA, and he wrote me a RX for Magnesium Oxide - 400 MG in Tablet form. [they just arrived!] so why the different forms of Magnesium? I noted one poster mentioned that the MG-Oxide was cheaper. This sounds like the VA, as they seem to offer the least expensive version of medications as I had a dickens of a time getting Eliquis from them. I need to understand the difference in the two forms of Magnesium.
I welcome any information that will help me ask the right questions when I approach the VA Dr. Than ks.

You definitely want the magnesium chloride, it is more bio-available for your body to use efficiently.

I saw a write-up on magnesium supplements a few days ago but I can't remember how or where I stumbled across it.