why do i feel worse after my b12 injection reddit Feeling Injection: Answering concerns Feeling awful after 2nd loading

Approximately 40-50% of people are deficient in B12, with rates reaching 50% among those with hypothyroidism

[21] [22] This condition impairs B12 absorption in the terminal ileum and typically requires lifelong parenteral replacement therapy

Contributes to the treatment of split ends and hair loss

The ability to shuttle between the +1, +2, and +3 oxidation states is responsible for the versatile chemistry of vitamin B 12 , allowing it to serve as a donor of deoxyadenosyl radical (radical alkyl source) and as a methyl cation equivalent (electrophilic alkyl source)

B vitamins are often prescribed together because deficiency of one B vitamin usually signals that others are deficient