Someone posted this: magnesium supplementation got rid of the head twitch immediately; the other symptoms have subsided over the last 2.5 months (I am giving her less than the RDA for her age because I do not want to cause an imbalance). As I learned from the report, there are magnesium antagonists, like dairy and phytates in wheat. Calcium supplements can also cause magnesium imbalances if taken alone and in large quantities.
Remember, there can be multiple causes to a symptom; and nutrients act in concert so not one is more important than another (that is one reason I am not a big fan of supplements). For instance, B-complex, like fish oil, has been used to eliminate or alleviate symptoms of depression and hyperactivity. For what I have read, B-complex is necessary for proper absorption of magnesium, and magnesium is needed for proper metabolism of fats, and to regulate the uptake of calcium into cells. We know a lot, but that is just the tip of a very large iceberg!!