Dangers and Complications of Deficiency
In addition to signs and symptoms, there are some complications that may occur with this deficiency. These include:
Cataracts: This condition is characterized by the eye's lens clouding and the vision becoming affected. Blurry vision, glare, double vision, poor night vision and colors seeming to fade are common symptoms.
Peripheral neuropathy: This condition is characterized by the peripheral nerves not working properly due to damage. A nerve group or a single nerve may be damaged. Numbness, pain and tingling in the legs and arms are generally the first symptoms. Muscle problems may follow as the condition progresses, followed by organ problems, such as digestive or cardiac symptoms.
Mild anemia: This complication may be secondary if this vitamin deficiency interferes with the absorption of iron. Mild anemia may not cause any symptoms, or the patient may experience fatigue, dizziness, shortness of breath, paleness, chest pain, extremity coldness, weakness, irritability, depression, brittle nails or irregular heartbeat.
Malignancy: The associated malignancies are cervical and esophageal dysplasia. Both of these are considered precancerous conditions.