Procedures that can be performed with local anesthesia, minimal sedation, neuraxial techniques, or peripheral nerve blocks may offer risk reduction when clinically appropriate
pubmed.ncbi.nlm.nih.gov/29986520 Pickart L
It mandates validation of every process, rigorous environmental monitoring, and batch testing for sterility and potency
Campolo J, Bernardi S, Cozzi L, et al
Cognitive improvement: patients were considered improved if the patient and/or family member reported relevant changes in the quality of at least one of the following symptoms: improved forgetfulness
This means that it is not possible to overdose on vitamin B12, and as far as we know there is no upper limit on the amount of B12 that can be taken safely by an otherwise healthy person