Vitamin B12 supplements

Pernicious anemia

Both oral and injectable vitamin B12 supplements are used to treat pernicious anemia. In those who lack sufficient intrinsic factor and cannot absorb vitamin B12, it is usually given by injection, although there is evidence that oral administration in high enough doses is effective. An intranasal gel is also available.


Lower than normal serum vitamin B12 levels are common in those infected with HIV and may help predict those patients in whom the disease will progress most rapidly. AIDS patients often show signs of nerve damage including numbness and tingling in the hands and toes, and vitamin B12 may be useful in treating these symptoms. Recent studies have found that deficiency of vitamin B12 is associated with lower measures of immune system effectiveness in HIV-positive people and that increasing vitamin B12 levels increases these counts.

Vitamin B12 supplementsSleep

Some research suggests that vitamin B12 might affect sleep quality and performance. In a 1996 study, researchers explored the effects of 3 mg of vitamin B12 on the quality of sleep and work performance often healthy, male staff members of an Austrian industrial plant. The results showed better sleep quality and shorter total sleep time in those taking supplements.

Other uses

Vitamin B12 therapy has also been used to treat Alzheimer's disease, childhood asthma in those sensitive to sulfites, insomnia, diabetic neuropathy, some psychiatric disorders including depression, and some forms of dermatitis.

Vitamin B12 injections are used by some people as a general tonic and many people report feelings of increased energy and improved health after these injections. Between 70 and 90 per cent of any dose over 1 mg is excreted into the urine.

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Vitamin B12
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Vitamin B12 deficiency
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Vitamin B12 recommended daily
Vitamin B12 supplements
Vitamin B12 interactions



Other Vitamins:

Vitamin A
Beta carotene
Vitamin B6
Vitamin B12
Pantothenic acid
Vitamin C
Vitamin D
Vitamin E
Vitamin K