Kopi luwak is made from coffee cherries eaten by Asian palm civets and collected from their droppings. It is among the most expensive coffee in the world, and we would not buy it.
The original claim
Wild civets select the ripest cherries, and enzymes in their digestive tract alter the beans’ proteins, reducing bitterness.
There is some chemistry behind that. There is no evidence it produces coffee better than carefully selected, well-processed beans — and blind cupping generally scores it unremarkably.
The welfare problem
Demand vastly exceeds what wild collection could supply. The overwhelming majority is produced by caged civets, force-fed coffee cherries, in conditions that are well documented and poor.
Certification schemes claiming wild collection have repeatedly been found unreliable.
The honest position
A novelty sold on story rather than cup, with a real animal welfare cost. Spend the money on a Geisha or a Kenyan and you will drink better coffee.
The relatives
Black ivory (elephants), jacu bird coffee (Brazil). The same logic and the same objections.