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Cyanocobalamin can lead to optic nerve damage (and possibly blindness) in people with Leber's disease
There are many reasons why the body requires vitamin B12
It is available in certain clinics under compounding programs, but quality and consistency can vary widely depending on the source (FDA PCAC briefingcompounding context)
Unlike oral supplements, which must pass through the digestive system, intramuscular vitamin injections provide faster, more effective resultsespecially for those with digestive issues or nutrient absorption problems
doi:10.1111/j.1572-0241.2002.05781.x 15Pruitt R, Hanson J, Safdi M, et al
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