Is Glycine and L-Theanie both safe to take?

My meds are risperdal 4mg before bed
Ive been taking L-Theanine and i feel very much better
Reservatol and L-Theanine are the best
(1 week reservatol, 1 week L-Theanine)
I checked my old storage room and found Glycine powder. I remembered i was reading about glycine and dont remember the reason why i bought it.

What is glycine? What does it do?

Glycine is an amino acid which is supposed to calm you down.