How is B12 deficiency typically treated?

B12 deficiency is typically treated with vitamin B12 injections, particularly when the deficiency is significant or when absorption issues are present. The choice of 1000 mcg monthly injections is effective because it allows for the bypassing of potential absorption barriers in the gastrointestinal tract. This is particularly important for individuals who may have conditions such as pernicious anemia, where the body cannot properly absorb B12 through normal dietary means due to a lack of intrinsic factor.

Injections ensure that a sufficient amount of B12 enters the bloodstream directly, helping to quickly replenish the body's stores and alleviate symptoms associated with deficiency. Additionally, the scheduled monthly administration helps maintain adequate levels over time in those who cannot absorb the vitamin effectively through oral routes.

Other treatment options, such as daily B12 oral tablets or intranasal sprays, may also be used but are generally less common for treating more severe deficiencies. Oral supplements depend heavily on the person's ability to absorb B12 through their gut, which may not be reliable in some cases.