Yes, with the bitters, you just need a little bit of that bitter taste towards the back of your tongue.
It stimulates the bitter taste receptors to increase salivation, which increases the stomachs digestive juices to be secreted.
This increases the flow of digestive juices from the pancreas, and liver that results in better absorption of nutrients and less undigested food being passed through the digestive tract.
They can also trigger the body to repar it’s own digestive tract!
Your not really consuming the bitters just activating the taste buds.