<s>[INST] Hi, may I answer your health queries right now ?  Please type your query here...hi I have had low hgb results for many years and have been on iron supplements as a result they continue to be low should I be concerned? What may be causing this even with supplementation? [/INST] Hello and welcome to Chat Doctor, Low hemoglobin levels despite iron supplements suggests that the low hemoglobin is not due to iron deficiency. Thus, more investigations need to be done to know the cause of anemia or low hemoglobin. The investigations include red cell count, hematocrit, red cell indices, vitamin B 12 and folic acid levels. The probable cause of anemia will be determined by these investigations. Thanks and take care Chat Doctor.  </s>