I suggest that you consider a different approach to liver support rather than taking the glutathione.
We run into this issue fairly often in the heavy metal detox groups. I think the approach of detox consultant, A. Cutler, makes sense on this subject. He encouraged people to support the body's natural production of glutathione. Then use chelation and antioxidants to reduce oxidative stress
For example, I saw a study by Adams on chelation with DMSA in kids with autism. Those kids often have low glutathione. A surprisingly small amount of chelation normalized their glutathione for more than a month. I have links to details if requested.
Remember the sulfur (thiols) in glutathione is going to mobilize heavy metals. We would be wise to maintain a safe balance between mobilized HMs and those that are removed from the body. People who have MCS seem to be sensitive to mobilization. John is one such person who was sensitive to thiols. http://onibasu.com/archives/fdc/90511.html http://onibasu.com/archives/fdc/115720.html