Without barriers such as digestion, the body absorbs 15-97% of the injected B12, making injections much more efficient at raising blood levels quickly even if the pill dose is higher
What are the common symptoms of Vitamin B-12 deficiency
Dietary deficiency: Vegans (strict vegetarians who do not eat any meat, fish, egg, or dairy products) can develop vitamin B 12 deficiency because they lack vitamin B 12 in their diets
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Initial signs of response typically appear by week 3-4, with meaningful results developing through weeks 5-8
Persistently high results could signal a blood disorder, a malignancy or a problem with the liver or kidneys
