Home > Newsletters > Daily: Love or hate Earth Hour? > Daily Dose: This is why your vanilla or cinnamon flavoured e-cigarette is toxic > Health-in-Motion Updated 08 December 2017 Beer can make you happy. Beer can make you happy. This has been common knowledge for millennia, but now a team of German researchers has discovered the reason why. They investigated some 13 000 chemical components found in food to identify those that can interact with the so-called dopamine D2 receptor and thus stimulate the brain’s reward centre – the kind of ingredients that make us come back for more. It turns out that beer contains hordenine, a substance present in malted barley, which does so quite well and probably accounts the feel-good factor beer drinkers experience. 0 More: Daily Dose: This is why your vanilla or cinnamon flavoured e-cigarette is toxicHealth-in-Motion advertisement Other news Mental health WATCH: This is how casinos use smell to hack your brain Medical This common medication can cause behavioural problems in children if taken during pregnancy Medical Caring for children whose parents succumb to drugs and alcohol Mental health Do you think your personality needs an overhaul? Diet and nutrition Scientists explore a surprising new source of omega-3s Diet and nutrition WATCH: These foods can boost your immune system Live healthier Heart health » 5 women share exactly what it feels like to have a heart attack 'I felt like I had a pill stuck in my throat.' Diet & Nutrition » 8 benefits of gherkin juice that will make you want to drink some ASAP Goodbye, salt craving.