Nicotine is an alkaloid (molecule that mostly contain basic nitrogen atoms) that is used as a psychotropic substance. Its name comes from Jean Nicot and it has been discovered in 1828. It can be found in tobacco, in e-liquids (in a synthetic form) but also in eggplants, in potatoes or in tomatoes, in small quantities. Nicotine leads to an increase of blood pressure, of heartbeat through the release of adrenaline. It also reduces the appetite, improves focus and memory. However it’s highly addictive.