DiverDown2 wrote: Would you clarify some time ?____________________
Would it be wise to continue the Highest dosage for years, if not how much would you cut back to ? _________________
I would go by symtom decrease and improvement of lab-markers. For example, if serum retinol and retinol binding protein would show too high levels, I would cut back by half. Same with 25(OH)D, and retest after half a year again. These 2 fat solubles might be harmful at too high serum levels. Others I definitely would test is Magnesium in whole blood or RBC, ferritin, zinc and copper.
From general labs you can see a tendency of improvement or worsening. And adjust doses accordingly, if there are connections between lab-markers and nutrients (which usually there are).