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What are the main benefits of Vitamin B12 injections
Liu, J., Deng, Z., Zhu, X., Zeng, Y., Guan, X., & Li, J
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Neither option is universally superior the right choice depends on your medical history and goals, and a licensed provider can help you decide
A 2021 systematic review of 16 randomized controlled trials and 6,276 participants (Markun and colleagues, Effects of Vitamin B12 Supplementation on Cognitive Function, Depressive Symptoms, and Fatigue, Nutrients, 2021) found that B12 supplementation does not reliably reduce fatigue in people who are not deficient
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