organic glutathione supplement Liposomal 500mg - Pure L Glutathione (GSH) Reduced - Active Form, Made with Whole Food, Non GMO Phospholipid Complex - Antioxidant Glutathione Supplement | Glutathione Antioxidant
Description
In a healthy cat, the tissues retain B12 for an average of 13 days, but in a cat with gastrointestinal disease or other health problems, B12 may stay in the body for only about 5 days

Zeitlin A, Frishman WH, Chang CJ

There are lots of over-the-counter forms of B12 to choose from, including pills, lozenges, and sublingual tablets

doi:10.1016/j.autrev.2011.01.009
