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While many individuals can benefit from B12 injections, certain groups may see more significant or rapid improvements: Vegetarians and Vegans Plant-based diets are often low in B12, making supplementation crucial

Subcutaneous injection delivers GHK-Cu systemically, which makes more sense for wound healing and skin remodeling protocols

This provides approximately 4mcg/kg for a 160lb individual, falling within the effective clinical range

Each format has trade-offs in absorption and handling for research

People who have conditions that make absorption difficult are also good candidates for B12 shots

More significantly, MOTS-c administration shifted the trajectory of age-related metabolic decline, indicating that the peptide's benefits are not limited to preventing dysfunction in young animals but can partially reverse established decline [2]