Hi Joey,
Earlier this year, Dr. Mauskop of the New York Headache Center conducted a test on himself at the Aspire Center for Health And Wellness, a center in NYC which offers floatation. Through pre and post float blood tests, he did not find a signifcant change in levels in Mg in his body. That may not be themost appropriate test, but it's one indicator. The caveat is that Dr. Mauskop is not Mg-deficient, so the next logical test is to have one of his patients be tested. There are some lab fees for that, but we intend on supporting that test to see if there are any noticeable results.
Cheers,Mark