jikm.or.kr/m/journal/view.p...
I have never heard of this 'supplement' but this research article suggests it helped an Indonesian man suffering RLS because of kidney disease.
As only one person is mentioned in the trial, it's not ideal, but as we know, if you are desperate and nothing else has worked, it's good to know of something positive.
It is a herb widely used in Korean medicine.
ncbi.nlm.nih.gov/pmc/articl...
Another possibility in the RLS arsenal.
I wonder if anyone has tried it.