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2. Vitamin B12 deficiency - Wikipedia

   en.wikipedia.org/wiki/Vitamin_B12_deficiency

   Vitamin B 12 deficiency is preventable with supplements, which are recommended for pregnant vegetarians and vegans, and not harmful in others. [2] Risk of toxicity due to vitamin B 12 is low. [2] Vitamin B 12 deficiency in the US and the UK is estimated to occur in about 6 percent of those under the age of 60, and 20 percent of those over the ...

3. Peripheral neuropathy - Wikipedia

   en.wikipedia.org/wiki/Peripheral_neuropathy

   Peripheral neuropathy may be classified according to the number and distribution of nerves affected (mononeuropathy, mononeuritis multiplex, or polyneuropathy), the type of nerve fiber predominantly affected (motor, sensory, autonomic), or the process affecting the nerves; e.g., inflammation (), compression (compression neuropathy), chemotherapy (chemotherapy-induced peripheral neuropathy).

4. Toxic and nutritional optic neuropathy - Wikipedia

   en.wikipedia.org/wiki/Toxic_and_nutritional...

   The predominant cause of nutritional optic neuropathy is thought to be deficiency of B-complex vitamins, particularly thiamine [2] (vitamin B 1), cyanocobalamin (vitamin B 12) and recently copper. [3] Deficiency of pyridoxine (vitamin B 6), niacin (vitamin B 3), riboflavin (vitamin B 2), and/or folic acid also seems to play a role. Those ...

5. Subacute combined degeneration of spinal cord - Wikipedia

   en.wikipedia.org/wiki/Subacute_combined...

   Prolonged deficiency of vitamin B 12 leads to irreversible nervous system damage. HIV-associated vacuolar myelopathy can present with a similar pattern of dorsal column and corticospinal tract demyelination. [citation needed] It has been thought that if someone is deficient in vitamin B 12 and folic acid, the vitamin B 12 deficiency must

6. Megavitamin-B6 syndrome - Wikipedia

   en.wikipedia.org/wiki/Megavitamin-B6_syndrome

   Vitamin B 6 Excess, Hypervitaminosis B 6, Vitamin B 6 Toxicity [1] [2] Specialty: Neurology, toxicology: Symptoms: Peripheral sensory neuropathy: Usual onset: Gradual onset with slow progression, in the usual case of chronic vitamin B 6 supplementation. [3] Duration: Usually, but not always, resolves within six months from the cessation of ...

7. Neuritis - Wikipedia

   en.wikipedia.org/wiki/Neuritis

   Deficiency of vitamin B 12 causes subacute combined degeneration, a disease classically associated with a central demyelinating process; however, it also presents with a painful peripheral neuropathy. Treatment of vitamin deficiencies focuses around repletion of specific deficiencies, recovery is often prolonged and some of the damage is often ...