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Chronic Conditions: Individuals with chronic conditions that affect B12 absorption, such as pernicious anemia or gastrointestinal disorders, may need regular injections throughout their lives

All experiments were approved by the Ethics Committee of the Plastic Surgery Hospital (Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China

Older adults are also more likely to take medications that can interfere with B12 absorption, Manson says

However, it is not the same as prescription or injectable growth factors