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Vitamin B12 injections usually contain high levels of this substance, which works to raise vitamin B12 levels in the blood
What works quickly for one person might have a more gradual impact on another
But theres one big problem: Those who take cyanocobalamin typically dont feel any better, even while using large doses of B12
Clinical Practice, 9(4), 353-356
Visual clarity is a non-negotiable quality marker
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