Hi My 14 year old daughter experiences PMS and last month she was really irritable and weepy. This makes her very gittery and this is all new to her so she's confused. I wanted to get her a natural supplement to help calm her nerves. Is there a chinese medicine that someone knows of? Also I saw this Theanine Serene product that has taurine and GABA in it, supposedly they have a calming effect. Any advice or input about would be great. thank you.