b12 injections causing fatigue What You Need to Know About Vitamin How Fast Does B12 Injection

[16] In urgent situations like isoniazid overdose or vitamin B-dependent seizures, only the injection can rapidly achieve the high serum levels of pyridoxine needed to correct the problem

Adv Nutr 2017;8:971-9

Health experts recommended daily allowances (RDAs) for B12 intake recommendations vary by age, but the recommendations are the same regardless of your sex [1]: - 0 to 6 months 0.4 mcg - 7 to 12 months 0.5 mcg - 1 to 3 years 0.9 mcg - 4 to 8 years 1.2 mcg - 9 to 13 years 1.8 mcg - 14 years and older 2.4 mcg If youre pregnant, the National Institute of Health recommends you ingest at least 2.6 micrograms of B12 per day

If you don't get enough, you may experience symptoms of deficiency like fatigue, weakness, or nerve damage

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