is b12 injection better than tablets Injections vs. Oral Supplements: Which Better? What are the benefits of
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10.1074/jbc.M114.579565 31 FrederickD

Fully functioning VDR Taq genes are needed to manufacture dopamine and norepinephrine and people with the VDR Taq mutations do not make enough dopamine/norepinephrine

PMC10706451 Brown B, Cohen L, Jackson R, et al

Vitamin B12 injections were once the domain of high-end health spas and clinics but are now more accessible, thanks to websites that offer vitamin B12 shots to be administered in the comfort of your own home

Having a lack of intrinsic factor (IF) , a substance that binds to B12 so it can be absorbed into the bloodstream (5)
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