Asian palm civet digestive juices enter into the beans and modify the micro-structural properties of these beans. Proteolytic enzymes cause substantial breakdown of storage proteins. Kopi Luwak is traditionally made from the faeces of wild civets, however, due to it becoming a trendy drink, civets are being increasingly captured from the wild and fed coffee beans to mass-produce this blend. Many of these civets are housed in battery cage systems which have been criticised on animal welfare grounds. The impact of the demand for this fashionable coffee on wild palm civet populations is yet unknown but may constitute a significant threat. In Indonesia,
White coffee milk, corn syrup derivatives, soy, or nut products. Sweeteners used include cane sugar or artificial ingredients. White coffee should be distinguished from café au lait, in that white coffee uses chilled or room-temperature milk or other whitener, while café au lait uses heated or steamed milk. In Indonesia, the term white coffee or "kopi putih" refers to coffee beans which are roasted less than regular coffee beans. The shorter and lower heat roasting yields lighter-colored coffee beans, called "biji kopi putih" or white coffee beans. The white coffee beans are harder and different in taste than regular coffee beans. White