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Some find it messy
The aim is to restore vitamin B12 to a healthy level and then maintain it safely. Doctors usually determine dosage based on blood test results
[95] Intramuscular or intravenous injection [edit] Injection of hydroxycobalamin is often used if digestive absorption is impaired, [2] but this course of action may not be necessary with high-dose oral supplements (such as 0.51.0 mg or more), [97] [98] because with large quantities of the vitamin taken orally, even the 1% to 5% of free crystalline B 12 that is absorbed along the entire intestine by passive diffusion may be sufficient to provide a necessary amount
It is also important for the normal function and development of the brain and the nerve cells
Most women get the recommended daily amount 2.4 micrograms (mcg) for most adults, 2.6 mcg for pregnant women, and 2.8 mcg for women who are breastfeeding in their diets
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