I was curious about dosages, too. Just looking at the abstracts, the third one said 100 mg per day. I'm assuming that meant 100 mg of EACH per day? It didn't say anything about body weight. The second didn't mention dosage at all. I was kind of surprised to see in the first that the B6 was 10% of the Mg amount.

Tom has epilepsy. At one point, I asked his neuro about vitamin supplementation to try and prevent seizures. He said that magnesium and vit B6 were "calming to the brain" and recommended 50 mg each. (At the time, Tom was 30 pounds.) Those were the only two he mentioned. (Well, he also recommended a good multi-vitamin because Tom was taking an AED at the time. The B6 and Mg were above and beyond his usual recommendations.)