What does "Vitamin B12 deficiency" mean in a report or doctor's letter? In our medical dictionary, you will find a patient-friendly explanation of the meaning of this medical term.
Vitamin B12 deficiency is a condition where a person's body does not have enough of a certain type of vitamin called B12. This vitamin is important because it helps the body make red blood cells, which carry oxygen around the body. If a person doesn't have enough Vitamin B12, they can feel tired, weak, and have other symptoms. This condition can occur if a person doesn't eat enough foods that contain Vitamin B12, or if their body can't absorb the vitamin properly.
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