Psychologist Loretta Graziano Breuning explains the science of happiness and how to use it to boost your wellbeing.

When you read self-help books – whether about love, productivity, or happiness – you're bound to bump into chemistry at some point.

Researchers have uncovered how some of our brains' key chemicals work for and against us.

Endorphins, oxytocin, dopamine, and serotonin are the four major chemicals in determining our happiness, and Loretta Graziano Breuning's book Habits Of A Happy Brain is all about them.

Breuning is a professor emerita at California State University East Bay, writer, researcher, and guide at the Oakland Zoo, where she shows people how to manage their inner mammal based on animal social behavior.