[1] [2] However, longstanding neurological complications, such as peripheral neuropathy or cognitive changes, may require three to six months of consistent treatment before significant improvement occurs, and some damage may be irreversible if treatment is delayed
Blood tests are now required
2,97 Studies and clinical practice of treatment of pernicious anaemia with regular high-dose injections has confirmed the safety of B12 at high dosages, and therefore neither the Institute of Medicine (IOM) in the USA nor the European Food Safety Agency (EFSA) have set an upper limit
Castilla-Cortazar I, Garcia M, Quiroga J, Diez N, Diez-Caballero F, Calvo A, Diaz M, Prieto J