Serotonin Dominance Well or GABA Dominant?

When you say that someone is serotonin can be serotonin dominant or GABA dominant. Can you give us some of those traits and I think there's a couple quizzes out there. So when you look at your custom Nutropics, I guess, can you a little bit walk us through what you do with a client? How do you determine what they're dominant in or lacking?