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Hello from JustAnswer. This is Dr. Love.
Red cell maxcrocytosis means that the red blood cells are larger than normal. Macro = large, cyto = cells.
Large red blood cells are frequently due to a deficiency in vitamin B12 or folate, which is why it is recommended that these levels be checked in a Haematinic profile. These nutritional deficiencies also can contribute to anemia and feeling exhausted.
There are many other possible causes of red cell macrocytosis, including a response to moderate to high alcohol ingestion, liver disease, thyroid disease, or COPD. There are also certain chemotherapy drugs that can cause enlargement of red blood cells.
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