We like to think we are in full control of our lives but a lot of our decision making, our moods, and behaviors do not come about as a result of our own sense of free will or thinking but the chemical makeup in our brains.

So what exactly is going on up there and how do chemicals shape our daily lives?

Jonathan speaks to Ginny Smith, presenter, founder of Braintastic Science, and author of 'Overloaded' to discuss.

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