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Key Takeaways: B12 shot effects stay for about one to two weeks Some people notice benefits lasting up to a month If absorption is an issue, weekly injections might be necessary Energy, mood, and metabolism can improve at different paces Your past health impacts how long the effects stay
Check out my videos The Optimal Vitamin B12 Dosage for Adults and The Optimal Vitamin B12 Dosage for Kids, Pregnancy, and Seniors which go into detail
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Evolving incretin-based therapies in Japan: optimizing treatment strategies for diverse clinical and socioeconomical profiles in type 2 diabetes
Caution is advised regarding the use of oral supplements in patients with pernicious anaemia, meaning that careful monitoring of symptoms would be required, and is not generally advised in patients with neurological symptoms, owing to limited efficacy and potentially serious impact of permanent neurological damage[25]
PMC (PubMed Central)
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