Dopamine is a neurotransmitter essential to the functioning of our nervous system. It acts on concentration, motivation and pleasure.

British neuroscientist TJ Power explains how to boost its release in a few actions. Expose yourself to the light of day for at least 10 minutes every morning, he advises. Ending your shower with a minute of cold spray boosts your morale almost immediately, he adds. The effects are also felt if the weather is gray, because the sun's rays pass through the clouds.