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The two most common forms of vitamin B12 youll encounter are cyanocobalamin and methylcobalamin
What's studied, what isn't
Hearing loss is the most common cause of tinnitus, and the two conditions share certain risk factors and mechanisms
While copper allergy appears rare, patch testing could be prudent for patients with a history of metal sensitivity or atopic dermatitis
Studies comparing localized versus systemic delivery for other biologics (botulinum toxin, platelet-rich plasma) suggest systemic routes produce more uniform results across larger treatment areas
You also assess how you feel and adjust the dose if needed
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