What is shrewdust?

Shrewdust refers to the finely ground powder produced from the dried bodies of shrews, small mammals belonging to the family Soricidae. It is often used in traditional medicine and herbal practices, particularly in some Asian cultures, where it is believed to have various health benefits. However, scientific evidence supporting its efficacy is limited, and its use is not widely recognized in modern medicine. As a term, "shrewdust" can also evoke a sense of folklore or historical remedies rather than contemporary medical practice.