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This method has good linearity, precision, specificity, and recovery, but it also indicates the need for careful monitoring and regulation of its use [2]

If you have certain rare conditions like Leber's disease (a hereditary eye disease), cyanocobalamin injections could potentially worsen vision problems

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A dose of 1 to 8 mg once weekly was given for 48 weeks in a phase 2 randomized controlled study for people with medical indications for weight management

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Both methods can improve B12 levels, but professional injections may suit those with specific health concerns