@713j I have done some reading on this and watched at least one pharmacological video on The Tube, and I have seen some weak evidence for one formulation being better for a given condition than one of the others widely available. I only take melatonin for sleep, and only allow myself that compound twice a week. I sleep well enough in between that I don't need more or any other 'remedy', including magnesium. When I take magnesium, about once a week...just 'cuz...I expect that it may help to keep me asleep longer. But it's really meant to ensure my heart doesn't go without. When in an ICU prior to my first ablation, they gave me two large white horse pills. I asked, and they said my potassium is low. Surprising, but who was I to argue, flat on my back 'n all. So, when I make a daily afternoon coffee for the missus and me, I sprinkle a dusting of potassium-chloride table salt (yes, at your grocers) into the carafe before pressing the power button. A dusting, again....just 'cuz. Not half a tsp.

I wanted to be comprehensive for you and for other readers later, hence my paragraph above. Back to Mg, I have only ever taken the citrate, bis-glycinate, and malate formulations. None of them did anything that I could put my finger on, good or bad. So, to me, you can take yer pick. The key is the Mg, in my mind. The most readily up-taken is the citrate formulation, according to the reading I have seen and to confirmatory posts by several other members here over the past two/three years. If your own reading and suspicion is that one works better than others, especially for sleep, or for the brain, etc, I wouldn't want to disabuse you of that assumption or conclusion. I honestly don't know any better.

@713j
Know you did not tag me but will pass on what my EP at Mayo Jacksonville told me.

Magnesium comes in a lot of different forms and each has a different added benefit. I was told to take 400 mg of Magnesium Citrate by my EP for PVCs. Why? He stated was the most absorbable.

Some individuals take the citrate to help with bowel movements as magnesium help bring water into intestines (EP not me). So some can have an increase in loose bowels when taking citrate. I was told if that was the case (again my EP) to take the glycinate as second best absorbed form. I have been taking 400 mg of citrate for over 2 years now. And yes did help with my PVCs along with some additional medication ordered for me recently.

My post and type of magnesium are not from "my view" but directly the information from my Mayo EP.