I have never heard or anyone managing candida without following the diet - there is no point in spending money in any of these if you do not follow the diet. If you keep feeding it, it will thrive due to the ideal ph _ You say: "There was a slightly elevated level of mercury," which creates the ideal ph for candida to proliferate.
Diet option A: no Sugar (not even fruit sugar, except lime, lemon and Granny smith green apples)- no carbs - except quinoa brown rice and buckwheat
Diet option B: fruitarian diet (fruit and nuts only)
This is step A - and from there you may move on.
Furthermore, itching is due to zinc deficiency a zc cream (diaper rash cream) and a zinc supplement (selenium is another option) will help to get rid of the toxins withour hurting your skin.
And if you do a search on this site with 'hair loss,, I remember having seen a few good posts regarding this topic