Would drinking excessive coffee reduce blood hemoglobin content? Would drinking excessive coffee, such as 4-5 20oz cups (100 fl.oz. / 3 L total) per day, reduce blood hemoglobin content?

Are there other digestion or gastric issues related to drinking excessive coffee?
coffee reduces iron uptake. parts of hemoglobin are comprised of iron. if hemoglobin becomes low the oxygen rate to other parts of your body decrease. causing low energy and fatigue. the low iron could also cause anemia.