Evidence-Based Supplement & Herb Guides

Hemoglobin Electrophoresis Test: Hemoglobin Types, Sickle Cell Disease, Thalassemia, and Results

Hemoglobin electrophoresis measures HbA, HbA2, HbF, HbS, HbC, and other variants to help diagnose sickle cell disease, thalassemia, carrier states, and inherited anemia patterns.

Hemoglobin electrophoresis is a blood test that separates the different forms of hemoglobin inside red blood cells. Hemoglobin is the protein that carries oxygen,...

High Absolute Neutrophil Count (ANC): Causes, Infection, Inflammation, and Meaning

High ANC means elevated neutrophils, often from infection, inflammation, stress, steroids, smoking, or marrow disorders. Learn causes, ranges, red flags, and follow-up tests.

A high absolute neutrophil count means the blood contains more neutrophils than expected for that lab’s reference range. Neutrophils are the white blood cells...

High Basophil Count Blood Test: Causes, Allergies, Inflammation, and Meaning

High basophil count on a CBC can mean allergies, inflammation, infection, thyroid disease, or a blood disorder. Learn causes, warning signs, and follow-up tests.

A high basophil count means your complete blood count with differential found more basophils than expected in your blood. Basophils are the least common...

High Eosinophil Count Blood Test: Allergies, Asthma, Parasites, and Meaning

Learn what a high eosinophil count means, including mild, moderate, and severe eosinophilia, common causes such as allergies, asthma, parasites, and medicines, and when follow-up matters.

A high eosinophil count means one type of white blood cell is above the lab’s reference range. Eosinophils help the immune system respond to...

High Hematocrit (Hct) Blood Test: Causes, Dehydration, Polycythemia, and Meaning

Learn what a high hematocrit blood test means, including dehydration, polycythemia vera, sleep apnea, smoking, testosterone, symptoms, risks, and follow-up tests.

High hematocrit means a higher-than-expected percentage of your blood volume is made up of red blood cells. Because red blood cells carry oxygen, the...

High Hemoglobin (Hgb) Blood Test: Causes, Polycythemia, Dehydration, and Meaning

High hemoglobin on a blood test can come from dehydration, smoking, sleep apnea, testosterone, high altitude, lung disease, or polycythemia vera. Learn what high Hgb means and when follow-up is needed.

High hemoglobin means the blood contains more hemoglobin than expected for your age, sex, and lab’s reference range. Hemoglobin is the iron-containing protein inside...

High Immature Reticulocyte Fraction (IRF) Test: Causes, Anemia Recovery, and Meaning

$Learn what a high immature reticulocyte fraction means, how IRF relates to anemia recovery, blood loss, hemolysis, and bone marrow response, and which follow-up tests help explain the result.$

Immature reticulocyte fraction, often shortened to IRF, is a blood test marker that shows how many young, newly released reticulocytes are present in your...

High Lymphocyte Count Blood Test: Causes, Viral Infection, Leukemia Risk, and Meaning

Learn what a high lymphocyte count means, including viral infection causes, absolute lymphocyte count interpretation, leukemia risk signs, and follow-up tests.

A high lymphocyte count means your blood has more lymphocytes than expected for your age and lab range. Lymphocytes are white blood cells that...

High MCV and Low B12 or Folate: Macrocytic Anemia Pattern and Meaning

High MCV with low B12 or folate can signal macrocytic anemia. Learn what this CBC pattern means, common causes, follow-up tests, symptoms, treatment, and recovery.

High MCV with low vitamin B12 or low folate usually points to a macrocytic anemia pattern, where red blood cells are larger than expected...

High Mean Corpuscular Hemoglobin (MCH) Test: Causes, Macrocytic Anemia, and Meaning

Learn what a high MCH blood test means, including links to macrocytic anemia, vitamin B12 or folate deficiency, alcohol use, liver disease, symptoms, and follow-up tests.

Mean corpuscular hemoglobin, or MCH, is one of the red blood cell numbers reported on a complete blood count. It estimates how much hemoglobin...

High Mean Corpuscular Hemoglobin Concentration (MCHC) Test: Causes, Spherocytosis, and Meaning

Learn what a high MCHC blood test means, including normal ranges, false high results, hereditary spherocytosis, hemolysis, spherocytes, symptoms, and follow-up tests.

A high mean corpuscular hemoglobin concentration, or high MCHC, means the hemoglobin inside your red blood cells looks more concentrated than expected. MCHC is...

High Mean Corpuscular Volume (MCV) Test: Causes, Macrocytic Anemia, B12, Folate, and Meaning

Learn what a high MCV blood test means, including macrocytosis, macrocytic anemia, vitamin B12 and folate deficiency, common causes, follow-up tests, treatment, and when to seek care.

Mean corpuscular volume, usually shortened to MCV, is the average size of your red blood cells. A high MCV means those cells are larger...

High Mean Platelet Volume (MPV) Test: Causes, Platelet Activation, and Meaning

High MPV means platelets are larger than expected. Learn what high mean platelet volume means, common causes, platelet activation links, risks, and follow-up tests.

Mean platelet volume, or MPV, is a platelet size marker reported on many complete blood count results. A high MPV means your platelets are...

High Monocyte Count Blood Test: Causes, Infection, Inflammation, and Meaning

Learn what a high monocyte count means, including normal ranges, infection and inflammation causes, blood disorder warning signs, follow-up tests, and when to seek care.

A high monocyte count means one type of white blood cell is above the expected range. Monocytes help your immune system clean up infection,...

High Neutrophil Count Blood Test: Causes, Infection, Inflammation, and Meaning

Learn what a high neutrophil count means, common causes such as infection and inflammation, when results are urgent, and how doctors evaluate neutrophilia.

A high neutrophil count usually means your immune system is reacting to something recent or ongoing. Neutrophils are the most common white blood cells...

High Platelet Count Blood Test: Causes, Thrombocytosis, Clot Risk, and Meaning

Learn what a high platelet count means, including thrombocytosis causes, essential thrombocythemia, clot and bleeding risk, follow-up tests, and treatment options.

A high platelet count means your blood test found more platelets than expected in a measured amount of blood. Platelets are small blood cells...

High Platelet Distribution Width (PDW) Test: Causes, Platelet Activation, and Meaning

High PDW means your platelets vary more in size than expected. Learn common causes, platelet activation links, platelet count patterns, symptoms, and follow-up tests.

Platelet distribution width, or PDW, is a platelet size-variation marker that may appear on a complete blood count. A high PDW means the platelets...

High Plateletcrit (PCT) Blood Test: Causes, Platelet Mass, Clot Risk, and Meaning

Learn what a high plateletcrit (PCT) blood test means, including platelet mass, common causes, clot risk, CBC interpretation, follow-up tests, and when to seek care.

Plateletcrit, often shortened to PCT on some complete blood count reports, estimates the total volume of platelets in your blood. A high plateletcrit usually...

High Platelets and Low Ferritin: Iron Deficiency, Inflammation, and Meaning

High platelets and low ferritin often point to iron deficiency with reactive thrombocytosis. Learn common causes, CBC patterns, inflammation clues, follow-up tests, and when high platelets need urgent evaluation.

High platelets and low ferritin most often point toward iron deficiency with a reactive rise in platelets. Ferritin reflects stored iron, while platelets are...

High Red Blood Cell (RBC) Count Test: Causes, Polycythemia, Dehydration, and Meaning

Learn what a high RBC count means, including dehydration, polycythemia vera, sleep apnea, smoking, oxygen problems, symptoms, risks, and follow-up tests.

A high red blood cell count means your blood sample contains more red blood cells than expected for your age, sex, hormone status, altitude,...