Cyanocobalamin is a form of vitamin B12 used in topical formulas as a skin-conditioning ingredient and sometimes for its characteristic pink-red color.
Topical B12 has clinical research in inflammatory skin conditions such as atopic dermatitis, where 0.07% cyanocobalamin creams showed improvement in controlled studies. That does not mean every cosmetic amount of B12 treats eczema, but it does support genuine skin-soothing biology beyond a simple colorant role.
Usage & cautions
People with known cobalt or vitamin B12 hypersensitivity should use caution.
Information approach
Consumer-friendly summaries are informed by established cosmetic ingredient references such as INCIDecoder and Paula’s Choice Ingredient Dictionary, while avoiding turning ingredient-level evidence into medical claims about the finished product.
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