Vitamin B12 dosage The average recommended daily amounts, measured in micrograms, vary by age: Infants up to age 6 months: 0.4 micrograms Babies aged 7-12 months: 0.5 micrograms Children aged 1-3 years: 0.9 micrograms Kids aged 4-8 years: 1.2 micrograms Children aged 9-13 years: 1.8 micrograms Teens aged 14-18 years: 2.4 micrograms Adults (19+ years): 2.4 micrograms Pregnant: 2.6 micrograms Breastfeeding: 2.8 micrograms Vitamin B12 foods You can get vitamin B12 from animal products, which have it naturally, or from foods that have been fortified with it
If youre looking for a quick boost in energy, injections may also be most helpful
If you are unsure whether B12 injections are right for you in the first place, that starts with your GP and a blood test, as set out in the NHS treatment pathway
For example, if a patient gets 1000 mcg in 1 mL of 1000 mcg/mL solution, changing to 500 mcg/mL means you need 2 mL to get the same dose
The carriers of native vitamin B12 in normal human serum