Paediatric neuroendocrinologist, Professor Robert Lustig, shows how our hormones and neurotransmitters drive our moods and behaviour, and shares the biochemical keys to happiness and how to achieve them (with the 4 Cs). He also demonstrates that by conflating pleasure with happiness for commercial gain, our modern societies prime us for addiction and depression, since they are biochemically inversely correlated; and how our children (and ourselves) are at risk of frying our brains.