1.In the first half of the 20th century, coffee farms on the Vietnamese plateau were still located in the vast forests where civets lived. When the coffee is ripe, civets will enter the farm to taste the ripe coffee fruit, while the coffee beans that have not been digested by civets will be excreted, which is the origin of the famous Vietnamese cat excrement coffee.

2. On the surface of scientific research, all kinds of digestive juices and digestive enzymes of civet cats did penetrate into coffee beans. These digestive juices and digestive enzymes contain catalytic enzymes, which can decompose protein macromolecules, form various short peptides and various free amino acids, promote Maillard reaction during frying, and form various new flavors.

3. Because the taste of coffee is influenced by protein components, it is considered that the change of the number and types of protein in the intestines of civet cats is the main reason for the special flavor of cat excrement coffee.