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NAD+ serves as an essential coenzyme in the mitochondrial electron transport chain and as a critical substrate for sirtuins, PARPs, and CD38-type enzymes involved in DNA repair, stress resistance, and metabolic homeostasis

Vitamin B12 Injection for Anemia One of the primary medical uses of vitamin B12 injections is the treatment of pernicious anemia, a condition caused by the inability to absorb vitamin B12 from the diet

Mechanism of action [edit] Vitamin B 12 refers to a group of compounds called cobalamins that are available in the human body in a variety of mostly interconvertible forms

Through its modulation of the NNMT-SAM-NAD+ axis, it enhances energy expenditure and supports more efficient utilization of fat stores for energy, making it a strong candidate in studies exploring metabolic optimization and obesity control