If you are just starting a course, we advise once a week for 6 weeks
and (3) other autoimmune diseases (eg, Hashimoto thyroiditis, insulin-dependent diabetes mellitus, Addison disease, and vitiligo) are common in such patients (139)
Morning dosing is generally preferred to align with natural metabolic patterns, though this has not been rigorously studied
(PubMed) Lauer AA, Grimm HS, Apel B, et al
There is an entire chain reaction that must take place to ensure that your body can use B12
Vitamin B12 is a water-soluble vitamin that the body needs for several essential functions