 [ Symptoms ] i suffer from a continuous reduction of hemoglobin [ Disease ] in my opinion you do not have malabsorbtion but you have mass losing of your iron stores or inability to transport iron possibilities are 1 long term use of anti inflammatory drugd 2 hookwarm need a stool test  3 chronic kidney disease 4 inflamatory diseasealso check you ferritinstore and transferrin transport  levels which can help you identify if there is a kidney or liver problem also a condition called atransferrinemia where you have a problem producing transferrinhope i was of help good luck