vitamin b12 supplements vs injections Do You Need a Prescription for Injections? MIC B12 from Fitish RX Oral vitamin B12 versus intramuscular

Older adults are another group

5-Amino-1-methylquinolinium (5-Amino-1MQ)

Deficiency can also be caused by poor absorption

Key gap: no human trial has been published, and no human pharmacokinetic study is widely available

A deficiency can lead to a form of anemia that causes fatigue

Problems with B12 deficiency A lack of B12 in your body affects several nervous system and red blood cell functions, which can lead to things like: Anemia: causes fewer red blood cells to move from your bone marrow Birth problems: increases risk of pregnancy loss and neural tube defects Osteoporosis: leads to poor bone health and fracture risk Macular degeneration: progression of age-related macular degeneration Memory loss: the onset of early-stage dementia is greater The advantages of B12 injections The decision to get a B12 shot instead of a supplement depends on factors such as your level of vitamin deficiency, the presence of symptoms, and how your need changes over time