大象传媒

The smell of delicious food does a lot more than tickle your taste buds. Tasty aromas trigger the brain to start preparing for digestion, including producing more saliva. This in turn kicks the rest of digestive system into gear - and all before you've even taken a bite. CrowdScience presenter Anand Jagatia speaks to Dr Rachel Herz, a leading expert on the psychological science of smell.