For those of you who are interested in the GABA / glutamate balance and its contribution to RLS / PLMD, here is an article that discusses the use of a probiotic to increase GABA and reduce glutamate.
pubmed.ncbi.nlm.nih.gov/295...
(I'm unable to access the full text article).
The study indicates that probiotics can be used safely to ameliorate glutamate excitotoxicity mostly through increasing depleted GABA and Mg2+ and decreasing the excitatory neurotransmitter, glutamate.