Quality control of herbal drugs. Laboratory researchers analysing the quality of herbal medications. Two researchers are seen in a quality control laboratory. One researcher is analysing a specimen under a microscope. Shelves with vessels containing chemicals and refined herbs are seen. Crude herbs can be seen in bags by the microscope. Chinese herbal medications consist of plant extracts such as herbs and spices; animal extracts such as bones, horns and teeth; plus minerals and fragrances. The Chinese pharmac- eutical industry refines these ingredients to powders and pills for patient consumption. Photographed at the Min Tong factory in Taiwan.