In the past I had low ferritin & have been supplementing fr yrs. Its now much higher at 89. However, I have read that it is important to have a full iron panel which includes CBC, serum iron and transferrin saturation rate etc in addition to just ferritin. I am wondering just how necessary it is to have these additional blood tests and if so how would you go about getting them. Are they available from yr GP or would I have to have them done privately. If so where.