[The First Aria]

Could it be your iron deficiency is caused by something other than black cohosh? In that case, cutting back on the black cohosh won't help. What about taking iron supplements to resolve your iron deficiency? Or maybe eating foods that are rich in iron?

Who knows if there is a direct relationship between Serum Iron and Black Cohosh. But I would assume the Doctor is trying to explore the easier explanations first. I can tell you that having "Iron Infusions", according to my Daughter" is not fun. And if the deficiency is severe enough, that is what will happen.

I would say what the Doctor suggests, and what Flame has suggested is the most prudent way to attack the iron shortcomings. Just my 2cents worth.