I’ve been doing hair mineral testing for 3 years and mine are still not all where they should be. My cobalt has gone from below the calibration limit to barely registering, despite MethlB12 supplement. My Manganese is skating along the lower edge of the reference range despite supplement. It took 3 years to get my potassium into range. It took 1.5 years to get my molybdenum into range. Since too much Mo is a bad thing, I then cut my supplement dose in half and my Mo dropped right back down (well, in the course of 7 months). I take my Mo as a separate pill. P.S. Bismuth is an Additional Element, not a Toxic Element.