does a b12 injection break your fast Why Do You Need Injections? · PA Relief B12 Injection Dosage and Frequency:

Common signs include tiredness, memory issues, pale skin, mood changes, and tingling in the hands or feet

Clinical trials used doses as high as 1 mg per day without safety concerns, but 300 mcg is the most commonly referenced dose in peptide medicine literature and in the investigational protocols that have been published since the formal trials concluded

[DOI] [PMC free article] [PubMed] [Google Scholar] 59.Dijk W, Mattijssen F, de la Rosa Rodriguez M, Loza Valdes A, Loft A, Mandrup S, et al

2020) confirmed that B12 levels at or above 1,000 ng/L were associated with solid cancers: OR 1.96 for cancers without metastases and OR 4.21 for cancers with metastases, after adjusting for all other causes of elevated B12