This is because B12 is not a standard medication in the US or UK, so it is often made in small-scale compounding pharmacies rather than in large-scale manufacturing facilities
Grozdanovic M, Laffey KG, Abdelkarim H, Hitchinson B, Harijith A, Moon HG, Park GY, Rousslang LK, Masterson JC, Furuta GT, Tarasova NI, Gaponenko V, Ackerman SJ
Important limitation: Saline is not recommended for peptides in acetate salt form, as sodium chloride can react with acetate groups causing precipitation
Unlike other antioxidants you need to consume through food, glutathione is naturally produced in your liver and helps protect cells and tissues against damage from free radicals and toxins