I have to do it at 62 . <| sep |> No he ' s not . You ' re acting like 8 . 9 is a bargain . <| sep |> Yeah you tranfuse blood at 70 usually , but you can tranfuse depending on symptoms also . There are also different measures of iron we use in clinical practice , ferritin , serum iron , and ferritin transferin ratio . The most likely cause of your low iron is increased red cell turnover due to your heavy periods , this is usually treated with oral supplementation and will vary according to guidelines , the GP will not normally request iron transfusion until you have seen someone else . I was just trying to comment your GP does not what he is talking about , they will normally want to get you seen , so you can treatment urgently which will be iron tranfusion . Giving lots of treatment orally would have affected the results of the colonoscopy and endoscopy . There are different iron preparations given IV , with different concentrations of iron within them so 200 mg is difficult to comment about . Other management options would include things like tranexamic and mefanamic acid , but usually gynae would see you prior to this . And to answer the comment below you definitely do not transfuse at below 8 regardless of what it was earlier . Transfusion guidelines vary depending on lots of things , some patients have a normal Hb of 4 , chronic heart failure patients you tend to tranfuse earlier .