I have experimented with magnesium L-threonate and I found it much the same as any other magnesium, so I dropped it because it costs more. I am a bit confused by the science behind it because it is said to get through the blood-brain barrier better than other formulations. But my experience of the relaxing effects before sleep surely shows that the other magnesium types get to my brain well enough. (By the way, I am not suggesting that magnesium actually induces sleep. Sometimes I find it hard to sleep even after taking magnesium, but the difference is that I do not feel bothered about it. I just lie there calmly, not stressing about the slow sleep onset, which has been a perennial problem of mine. I do not have racing thoughts when taking magnesium.)
I think my favourite formulas were magnesium glycinate and magnesium taurate. But I lately got a good deal on magnesium citrate, so I am going through that. Magnesium malate is fine too, as is LEF's mag 500, which is largely oxide.
I am not a great one for ascribing powers to supplements, because I am immune to most things. But I am in no doubt that magnesium is gently relaxing to me and calms my thoughts. Too much gets a bit cloying, but a couple of pills feels just about right.
We are all different, though. Other people might not respond the same.
Edited by Gerrans, 22 November 2014 - 11:06 PM.