Anemia

Anemia or anaemia is a condition affecting red blood cells, either a lack of red blood cells, a lack of hemoglobin in the red blood cells, or in total volume.

Effects
Anemia causes
 * tiredness
 * weakness
 * lack of energy, sometimes called fatigue

Causes and types
by Vitamin B12 deficiency or folate deficiency, which can be caused by:
 * Iron deficiency anemia
 * Megaloblastic anemia - which results from
 * an autoimmune disorder
 * Chronic gastritis
 * Surgery to remove all or part of the stomach

Learn more

 * Anemia - Penn Medicine
 * Iron-deficiency Anaemia - NHS
 * Vitamin B12 or folate deficiency anaemia - NHS