can pharmacy give b12 injections Vitamin Injection at a Licensed Vitamin B12 Injection – Manufacturer
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The intrinsic factor then binds with B12, facilitating the uptake of B12 in the small intestines.[ref] Without intrinsic factor, you cant absorb B12 from animal proteins

No adverse effects, allergic reactions, or irritation have been reported at concentrations up to 3%

As inflammation is a very complex and multipurpose process, additional studies are needed to better understand how NAD + levels influence different inflammatory states and in what context, and to determine how, mechanistically, NAD + metabolism impacts the biology of inflammatory immune and senescent cells

NAD+ therapy replenishes levels for improved quality of life
