Save more on our wholesale price. Saussurea costus - or kushta, is a plant in the family Asteraceae. Its root was known as costus to the ancient world. Costus is an herb. The root and oil from the root are used to make medicine. Costus has been mentioned in history many times and is believed to have been used in medicine for thousands of years. Taste bitter, recommend amount 2-5g. All wholesale products are in bulk, sifted and clean and packaged in a bag.