does vitamin b12 injections work Sublingual vs. B12 Injections: Which Option Is Right for You? – WhyNotNatural How Long Does It Take
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Most people will absorb it either way

[3] Initial treatment of pernicious anemia typically consists of 1,000 mcg intramuscularly daily for one week, then weekly for four weeks, transitioning to 1,000 mcg monthly for life

Expect to experience all the benefits of the injections within about 2-3 weeks

Let's say your vial contains 50mg of AHK-Cu powder

If you have stomach issues, skin problems, or other health challenges after eating

Deficiency with malabsorption/pernicious anemia: follow loading + maintenance injections
