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B12 injections are primarily recommended for addressing deficiencies and supporting overall health

In contrast, B12 injections offer a much more direct and reliable solution

FDA reportedly granted GRAS status for one specific oral formulation but not for the injectable peptide

Preclinical studies indicate potential roles in: Supporting healthy fat metabolism and reduction of adipogenesis Improving insulin sensitivity in metabolic research models Enhancing NAD+ salvage pathway efficiency Exploring effects on energy homeostasis and longevity pathways These findings remain preliminary and confined to laboratory and animal models