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22 May 2026 6 min Why do I feel worse after my B12 injection
Experience symptoms of B12 deficiency, such as weakness, tingling in the hands or feet, or brain fog
But one of the most common questions we hear from clients is: How long does it take for B12 injections to work? In this guide, well answer that question and explore everything you need to know about B12 injections, their benefits, timelines, and how MIXT IV Spa can help you achieve optimal wellness
How quickly does B12 injection work depends on how low your levels were beforehand