Ive only used inositol to help sleep so cant comment on it for anxiety etc but my quess is the dose is highly dependant and personal, you will likely have to experiment a bit. But we will bump it for more input
As far as I am aware.. inositol is myo-inositol. You cannot buy a product containing 'myo-inositol' anyway.. if you want to get totally bamboozled by science, go here: http://www.chem.qmul.ac.uk/iupac/cyclitol/myo.html