Vitamin B12
As with almost any vitamin or mineral found in food, B12 plays an important role in your overall health. Not only is it crucial in the creation of red blood cells as well as a building block in your DNA, it may also be a vital nutrient for your hair, according to the Nassau University Medical Center. Deficiencies in this particular vitamin can lead to hair loss in women. Together with a supplement of biotin, another B-vitamin, B12 is said to improve the health of your hair. But just because a deficiency in B12 may lead to hair loss, supplementation of this vitamin doesn't necessarily cause facial hair growth, especially when it comes to follicles that aren't already found along the skin.
Supplementation
When you're given a supplement of B12, it's usually due to anemia or vitamin deficiency, though it's extremely rare, according to the National Institutes of Health, to be deficient in B12. This is largely due to the fact that the body is actually able to stockpile years' worth of this vitamin, so it'll typically be anemia that brings about this supplementation. With the use of a B12 supplement, you'll often experience a lessening of symptoms associated with the condition, like fatigue, weakness, numbness, irritability and even confusion (to name only a few).
Side Effects
According to the Mayo Clinic, facial hair growth isn't a side effect or even an effect from B12 supplementation. It may, however, cause other issues, such as rashes, hives and itching as well as the development of papules or pustules. For some people, B12 may also cause clots to form along the blood vessels of your arms and legs, which may lead to swelling in the affected appendage as well as a shortness of breath or a dizzy sensation. In others, it may simply cause diarrhea. Regardless of how your body handles B12, you shouldn't notice any changes in your facial hair growth.
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