Subcutaneous injections are typically done at home by the patient or a caregiver
Z.et al (2015b)
In some cases of long-term severe deficiency, healing of the nerve damage may be extremely slow, requiring maintenance of B12 levels for months to achieve optimal recovery
Injectable GHK-Cu has a separate regulatory status than topical and should be confirmed with your provider
The ideal candidate for B12 injections include those who are deficient in B12, at risk of being deficient in B12, or those with signs of fatigue, weakness, or cognitive deficits
Li MH, Jang JH, Na HK, Cha YN, Surh YJ: Carbon monoxide produced by heme oxygenase-1 in response to nitrosative stress induces expression of glutamate-cysteine ligase in PC12 cells via activation of phosphatidylinositol 3-kinase and Nrf2 signaling