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Methods for the analysis of vitamin B 12 in food Several methods have been used to determine the vitamin B 12 content in foods including microbiological assays, chemiluminescence assays, polarographic, spectrophotometric, and high-performance liquid chromatography processes

doi: 10.1016/j.tips.2017.07.001 [DOI] [PubMed] [Google Scholar] 37

The vitamin, which may also be produced in the laboratory, is usually injected into the muscle of the thigh, upper arm or hip when necessary

For example, adults over 60 are more prone to deficiency due to decreased stomach acid production

Involvement of sigma-1 receptor in astrocyte activation induced by methamphetamine via up-regulation of its own expression

Neuroinflammation 18 (1), 239