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Description
Specific groups of people need to take vitamin B12 shots, such as Vegetarians and Vegans, older adults, individuals with gastrointestinal conditions, people with pernicious anaemia, pregnant and breastfeeding women, and individuals with symptoms of deficiency

doi:10.1016/j.clinbiochem.2003.08.004 E

This creates a cycle: damaged mitochondria produce less energy and more waste, which damages them further

Summary: There is no established scientific evidence that vitamin B12 supplementation or elevated B12 levels directly cause anxiety in most individuals
