Iron Supplementing Beware - B12 blood test levels off the chart

Thought I found the supplement sweet spot to get my ferritin levels up without messing up my digestion. Was taking an iron supplement with b12 added. It was the Megafood Blood builder one, and would highly recommend, EXCEPT on a recent blood test my b12 was concerningly high, above 1200 pg/mL.

I then looked at the supplement details and they have b12 at 30mcg 1200% daily. Thorne's popular iron supplement also has very high b12 added levels. B12 isn't a routine blood test, so posting incase someone else might have been unintentionally over dosing on b12.