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References Endesfelder, D., Engel, M

an unusual or allergic reaction to methylcobalamin, cobalt, other medicines, foods, dyes, or preservatives

In practice, most interest clusters around these real world goals: Skin quality and visible aging Wound healing support (when appropriate), which aligns with the principles of regenerative therapy Hair and scalp health conversations (still evolving, mixed quality evidence) Joint, tendon, connective tissue support as part of a bigger plan Recovery support, again in context And for some patients, the longevity benefit is simply this: better tissue repair capacity and less chronic inflammatory signaling can improve quality of life