I doubt it. I'm not a textbook mainstream institution kind of guy. I like thinking outside the box occasionally.I'd love to be your feed supplement dealer.
The RDA of 90 mg doesn't mean you should try to maintain 90 mg in your system at all times. It's the maintenance intake rate, and it already accounts for the half life in relation to your body's needs.
There are others besides me also. I had a farm visit from the top mineral rep in Ky for Purina a couple years ago....he asked what mineral i fed.....i said the wind and rain Hi-Mag year round. he just smiled and said he had been preachin hi mag for years and went on to tell how much magnesium a cow needed at all times. I thought to myself....finally somebody high up the ladder thinks like i do. This same guy used to manage a big ranch out west somewhere for a long time before going to work for Purina. Only problem with the W&R hi mag is that it only has about half the D3, E and A in it that the All season mineral has....which i think is important for cattle too this time of year......which is what I'm feeding now.