Vitamin B-12 is needed to maintain the health of many different organs in your body, including the nerves that run to your extremities. If you experience chronic numbness or tingling in your toes, it could be a sign of a vitamin B-12 deficiency. Your doctor will be able to measure vitamin B-12 levels in your body to determine if this is the cause of your symptoms.
Toe Numbness
Toe numbness describes any loss of sensation in your toes and may be preceded by a tingly or "pins and needles" sensation. Toe numbness can be due to problems with your circulatory system or your nervous system. Your toes may be one of the first parts of your body affected by nerve problems because the nerves that supply sensation to your toes are very long and have to traverse great distances from your spinal cord, so they are especially vulnerable.
Vitamin B12
Vitamin B-12, also known as cobalamin, plays a role in many different processes in the human body. This vitamin functions as a cofactor, which means that it helps specialized proteins speed up chemical reactions. Vitamin B-12 is needed to make new DNA and it also is essential for making new red blood cells. Myelin, a substance that covers and protects nerves, also needs vitamin B-12 for its synthesis.
Vitamin B12 Deficiency
A lack of vitamin B-12 can affect both your cardiovascular system and your nerves. People with a vitamin B-12 deficiency develop low red blood cell levels, also known as anemia. Vitamin B-12 deficiencies also cause damage to the nerves in your body, also known as peripheral neuropathy. This causes numbness and tingling, especially in your extremities. If the deficiency is not corrected, the nerve damage can be permanent.
Diagnosis and Treatment
Vitamin B-12 deficiencies can be caused by inadequate intake or absorption of this vitamin. Animal-based foods, such as meat, poultry, dairy products and fish are rich sources of vitamin B-12; a diet lacking these foods can result in a vitamin B-12 deficiency. Gastrointestinal disorders such as pernicious anemia can also contribute to a vitamin B-12 deficiency. This disorder can be diagnosed by measuring vitamin B-12 levels in the blood and by correcting the deficiency, either by changing the diet or using supplements.
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