Vitamin B12 Deficiency: Symptoms, Causes & Treatment If I took vitamin B12 injections and folic acid along with magnesium, a B complex, and carnitine, but there was no improvement and my condition actually worsened with increased anxiety, does this mean Why Your B12 Shots Are Not Working How Long Does a B12 Shot Last In Your Body?
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can b12 injections stop working What You Need to Know About Vitamin B12