Many people make the mistake of injecting B12 too quickly, which can cause discomfort, bruising, and reduced absorption
Chemical substances shall not be used as a drug, medicine, active substance, medical aid, cosmetic product, a substance for production of a cosmetic product neither for human consumption that is any food or food supplement or otherwise similarly used on humans or animals
When any component fails, oral supplementation becomes far less effective, potentially requiring massive doses to achieve therapeutic blood levels
Theres no such thing as magic.
You can lightly press gauze or a cotton ball against the area until the bleeding stops then discard items properly into a marked container