Efficacious Iron for Iron Deficiency Anemia in Adults Aged ≥18 Years

Inclusion Criteria: 1. Participants must be ≥18 years of age when signing the informed consent. 2. Participants with iron deficiency anemia are defined as follows for the purpose of this study: Male: Hgb \> 80 to ≤135g/L and Serum Ferritin \< 30 ug/L Female: Hgb \> 80 to ≤120g/L and Serum Ferritin \< 30 ug/L 2b. Local lab done prior to 7 days can be enrolled in the trial provided all the inclusion and exclusion criteria are met. 2c. Previously Screen Failed subjects not meeting the \<15 ug/L ferritin criteria can be rescreened once ICF is signed. 2d. Subjects not on iron supplement and meeting all the randomization criteria do not have to wait for 7 days for visit 2. 3\. Sex and Contraceptive/Barrier Requirements, Male and Female participants: None 4. Must have given written informed consent (signed and dated) 5. Medication Stopping: If the participant is currently on an iron supplement, they must be willing to discontinue the medication upon signing the Informed Consent Form (ICF) and throughout the study. 6. Protocol Compliance: Participants must be able to comply with the requirements outlined in the study protocol Exclusion Criteria: 1. Hemoglobin (Hb) ≤ 80 g/L 2. Medical history of current hematological disorders other than iron deficiency anemia (e.g., aplastic anemia, megaloblastic anemia, sideroblastic anemia, pernicious anemia, thalassemia trait, thalassemia, sickle cell anemia, etc.). 3. Medical history of chronic renal disease, current history of any known inflammatory disorder, and any chronic medical condition that, in the opinion of the Principal Investigator, would compromise participant safety. 4. Medical history or evidence of intestinal malabsorption, malabsorption syndrome, hemochromatosis, and hemosiderosis, hypochlorhydria, achlorhydria, gastrectomy, and gastrojejunostomy. 5. History of occult blood in the stool. 6. Obvious internal or external bleeding as documented by medical history if considered clinically significant in the investigator's opinion. 7. Severe and uncontrolled diseases, including serious psychological disorders, that are likely to interfere with the study. 8. Significant co-morbidity, such as a severe chronic medical condition unrelated to iron deficiency that is apparent on history or laboratory tests. 9. Iron Supplementation: Throughout the study duration, participants are not allowed to receive other sources of iron supplementation, including but not limited to other oral iron tablets and intravenous iron therapy. 10. Prohibited Medication: Inability to withhold prohibited medications. Prohibited medications include Proton Pump Inhibitors, Cholestyramine, colestipol, and new anticoagulant therapy initiated in the past six months (e.g., warfarin, apixaban, dabigatran, edoxaban, rivaroxaban). 11. Multivitamin and Mineral Supplements: Not willing to discontinue multivitamin and mineral supplements containing 35 mg or more of elemental iron per day on the day of screening and throughout the study. 12. Blood Transfusion, Blood Donation, and IV Iron Therapy: History of blood transfusion, blood donation, or significant blood loss (e.g., due to an accident or surgery), or intravenous iron therapy in the past four months. 13. Participants must not be currently participating in any other interventional clinical trial. 14. Pregnancy: A urine dipstick pregnancy test will be performed at Visit 1, and pregnant individuals will be excluded from the study. 15. Desire to Conceive Within the Next 13 weeks: This criterion includes patients who are actively trying to conceive or are receiving treatment to facilitate conception. They will be excluded from the study. 16. Known or Suspected Hypersensitivity to Iron: Individuals with a known or suspected hypersensitivity to iron or any of the components of Ferrous Fumarate (Eurofer), Polysaccharide Iron (FeraMAX), and Ferrous Ascorbate (EBMfer) will be excluded. 17. Planned Surgery: Participants with planned surgery during the study or those who had surgery within two weeks before the screening visit will be excluded. 18. Difficulties with Blood Sampling: Individuals with difficulties related to blood sampling that might hinder the study procedures will be excluded. 19. Alcohol or Drug Abuse: Participants showing evidence of alcohol or drug abuse that, in the opinion of the investigator, could interfere with study compliance or prevent understanding of the study's objectives and procedures will be excluded. 20. Inability to Follow Study Procedures: This includes individuals who are unable to follow study procedures due to factors like language problems or self-reported psychological disorders. 21. Enrollment of the Investigator, Family Members, and Clinic Employees: The investigator, their family members, and clinic employees will not be eligible to participate in the study to avoid any potential conflicts of interest