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Most individuals obtain sufficient B12 from a balanced diet containing meat, fish, dairy products, and fortified foods

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This varies by pharmacy and formulation

Sublingual B12 sprays such as the Super Shot are also more natural since they do not include certain binding agents and additives used in many B12 capsules

GHK-Cu, by contrast, is primarily investigated as a copper-binding signaling peptide that influences gene expression pathways associated with extracellular matrix remodeling and collagen regulation

For those with normal absorption and adequate B12 stores, injections provide no unique metabolic advantage