is glutathione mostly intracellular Glutathione-Related Enzymes and Proteins: A Review The Biological Functions of Glutathione

I have been using Mandie for many years she is very professional and gentle when doing the treatments TRACEY Mandy Fabulous

Distributed under the brand names Geref and Geref Diagnostic, it gained FDA approval in 1997 as a treatment for growth hormone deficiency but was discontinued in 2008 not out of concern for safety or lack of efficacy, but because of manufacturing difficulties.2 3 Yet it remains available in compounded form with a prescription from a licensed healthcare provider

Muchmore AV et al

Never purchase B12 injections from unregulated sources or self-administer without proper medical supervision and diagnosis

That is the whole recipe: purified water plus a small amount of preservative