glutathione and chronic kidney disease does affect function Glutathione Glutathione (GSH) degradation in peripheral

Hepatitis C Virus-Core and Non Structural Proteins Lead to Different Effects on Cellular Antioxidant Defenses

But more importantly, dialysis can be very hard on a cats body, and will most certainly impact a cats quality of life

The Neelakantan 2018 paper showed strong oral absorption in cell uptake (Caco-2) assays, which is why most research community use is by mouth instead of by injection

doi: 10.1002/ar.20725

However, due to its synthetic nature it is also the least bioavailable and active (Hunt, Harrington and Robinson, 2014) Methylcobalamin: The first of our non-synthetic forms of B12 is methylcobalamin, a naturally occurring co-enzyme