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Description
MC-Rs are a class of G protein coupled receptors, including multiple subtypes such as MC1R, MC2R, MC3R, MC4R, and MC5R
There is also a third pathway that makes nasal delivery uniquely interesting for certain applications
doi: 10.1016/j.jcmgh.2016.06.004
It is usually given as an injection to people affected by conditions that impair the absorption of vitamin B12 from the GI tract, including malabsorption and pernicious anemia
These are usually administered by a nurse
In this article, we explain how vitamin B12 works, what to expect after an injection, and when its appropriate to consider treatment
