For mild deficiencies or preventative supplementation, oral pills may suffice
Also, in most people, methyl and adenosyl B12 can inter-convert easily, so the exclusive supplementation of methyl B12 is enough in most cases
Clinical questionnaires commonly used in practice, like the DN4 (Douleur Neuropathique 4), LANSS (Leeds Assessment of Neuropathic Symptoms and Signs), and NTSS-6 (Neuropathy Total Symptom Score-6), among others, exhibit restricted diagnostic precision, demand substantial time for completion, and produce varying prevalence estimates for PN due to inconsistencies in agreement on sensitivity and specificity [34]
Potential risks and side effects should be reviewed with a qualified medical provider before starting treatment
Some groups are more likely to come up short, including older adults, people who eat little or no animal food, and those with digestive conditions that make absorption harder