If your body lacks sufficient B12 due to dietary reasons (e.g., youre vegan and not supplementing) or, more commonly, due to an inability to absorb B12 from your gut (e.g., pernicious anaemia, certain stomach conditions, or medications), then replenishing those levels with an injection will directly address the cause of your fatigue
American Journal of Physiology-Endocrinology and Metabolism 282:E326E335 Fox G, Gabbe B, Richardson M, Oppy A, Page R, Edwards E, Hau R, Ekegren C (2017) Twelve-month outcomes following surgical repair of the Achilles tendon
However, "safer" and "better" are not the same thing
3% VIP Luxury Products (these already contain a high concentration of GHK)
The company publishes Certificates of Analysis for its BPC-157 products, which it states are tested three times by independent third-party labs for identity, purity, potency, and contaminants including heavy metals, microbial pathogens, residual solvents, and LPS (lipopolysaccharide) contamination