Lots of ways biochemistry can be involved. I'd look at what I'm eating and sleep I'm getting, exercise, etc. Find a good B- Complex/multiple vitamin to try? I'm working on a long-term diet, exercise and lifestyle change for my high blood pressure, asthma and other chronic problems.

Get involved in learning a bit about human biochemistry and see if you can effect it your way first if you don't want to try meds? Keep talking if that's what you want (and carry a healthy snack :-)