Vitamin B12 occurs naturally in many foods, including meat, fish, and dairy products
Broader context on IV micronutrient delivery is documented in the clinical literature on intravenous micronutrient therapy, which describes the bioavailability advantage of IV delivery while noting where the evidence for routine use is still limited
You stay wherever you are.
If you are losing hair and researching copper peptides, here is what the published evidence actually supports, what it does not, and what the realistic timeline looks like
(2016) Nrf2 is the key to chemotherapy resistance in MCF7 breast cancer cells under hypoxia, Oncotarget , 7 , 14659-14672, doi: Njlsson, R., and Norgren, S