The nutritionist who put together that product was able to maintain exclusive rights to its formula, and it was designed for maximum absorption. - One of the main problems with magnesium products.
That, and mag oil are probably the best ways to go in getting in magnesium.
About eight years ago I attended a health lecture given by Peter Gilliam, the developer of Natural Calm. At the time he was about eighty five years old and looked like he was in his fifties. Still had his natural black hair with just a hint of gray.
Very interesting guy.
One thing I won't forget from his lecture is that he said that "all medications are drugs and all drugs are poison to the body".