Used in modern medicine to treat infectious diseases, cancer, hypertension and inflammation
Morphine was the first alkaloid isolated from plant Papaver somniferum, used as pain reliever and cough suppressant
Used for recreation and stimulation, e.g. nicotine, cocaine, cannabinol
Improve food preference through flavours
Protect plants from pests, e.g. glucosinolates in cabbage
Used as food preservatives due to antibiotic properties
Added to wines and chocolate to improve astringency, e.g. tannins