Groups at higher risk of deficiency include older adults (due to reduced stomach acid production), vegans and vegetarians, people with pernicious anaemia or gastrointestinal disorders affecting absorption, and those taking certain medications such as metformin or proton pump inhibitors
As stated previously, not only is Vitamin B12 good for weight loss and energy, but it also can help with other neurological disorders such as dementia or even other disorders such as pernicious anemia due to its role in the production of healthy red blood cells
[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
Benefits of Vitamin B12 Injections Enhanced Energy Levels Many individuals turn to Vitamin B12 injections for a quick and effective energy boost
Liu J, Yao S, Wang M, et al