Chemical symbol for?? ( The feel good factor)

Yes Serotonin!! Its wrapping paper bought to wrap our sons 21 st birthday present.. studying physics and Maths @ Exeter he will like this..

And appropriate Day 3 of Liver detox headaches much
less than yesterday and nausea subsided, I do like the food/ recipes all fresh food in the main, and have notice the difference not eating low fat rubbish thats full of other stuff..

Such an improvement on yesterday..
Great chemical symbol!