Has anyone taken glutamine while on Xeloda?

[heblaj01]

An elderly lady in my family is going shortly to begin low dose Xeloda after having started to progress on Vinorelbine+Herceptin.
To reduce the risk of possible side effects I have been considering glutamate supplementation based on some info on the web such as:
http://72.14.207.104/search?q=cache:...n&ct=clnk&cd=2

There are also these sites which unfortunately refer only to lab studies not much on clinical trials:

http://www.ncbi.nlm.nih.gov/entrez/q...=pubmed_docsum

http://www.practical-nutrition.com/default.asp?q=ad

http://72.14.207.104/search?q=cache:...n&ct=clnk&cd=7

Since I can't get an advice from her onc I wonder if any member of this forum has taken glutamine (with or without the approval of a caregiver), while on Xeloda or other chemo :for what purposes & with what results?