If you’ve been saving your fingernail clippings and need some quick money, you should consider selling them as traditional medicine ingredients in China.

Fingernail clippings are usually discarded as disgusting pieces of trash, but according to Chinese traditional medicine, they are valuable ingredients in concoctions used to treat conditions like abdominal distension in children and tonsillitis. Companies producing traditional Chinese medicine reportedly purchase fingernail clippings from schools and villages, which they then wash thoroughly before drying and grinding them into a fine powder that gets mixed into various medicinal products. Because human adults only grow about 100 grams of fingernails per year on average, collecting enough to keep up with demand is a difficult task and the price of clippings is relatively high.