Has anyone felt any relief from restless leg syndrome with taking L-Theanine?

I don't know about the supplement for restless leg syndrome. It may sound silly but if you place a nice dry bar of soap under your bottom sheet, near your leg area, it does help with RLS. I've done it as well as my daughter's and my family siblings!!
Oh and it doesn't matter what brand name of soap you use. I have no idea on how this helps but I know it does!!
Good Luck

L-tryptophan and 5-HTP worked great for me. But they pooped out after a year. But it might give you relief for a year, and perhaps won't poop out on you as it did for me. I am on Mirapex and it works and thinking of going back and forth from Mirapex to 5-HTP every time 5-HTP poops out. Perhaps after a while, it will work again. I also benefited from Neurontin, but that pooped out on me.

yes, I tried everything too. Rubs, meds, creams everything I could think of. Home remedies didn't work either. I finally found relief. I bought an oil from a reputable company and I put 5 drops under my tongue at night, held it for 90 seconds and there has not been even 1 hint of a RLS incident. This was in August 24th. , not quiet 4 months ago. I can sleep. I had it for many, many years. It's organic, no fillers and no GMO. 100% organic, grown in KY and shipped to around 130 countries and all US states. Please message me. RLS will drive one crazy.

Hello, I have used l - theanine 200mg in combination with liquid ionic magnesium also 200mg or 5 ml before bed with good results, also helps promote a calmness that can help with sleep induction. My rls is now mild to moderate so please don't expect a miracle but it is cheap enough to try out for a few weeks.
l-theanine is also useful if you take with coffee or caffeinated beverages to calm any jitters while allowing clean a feeling of energy. Good luck.