It sparked my interest to know about this ancient Japanese tradition using bird feces! The guano is sterilized with a UV Ray. The natural enzymes powder of the Nightingale feces helps remove dirt, shed dead skin cells and also leaving skin softer and brighter,  it contains an amino acid guanine with anmonic whitening qualities. This Japanese beauty secret has been used for Geisha make up as well as a make-up cleanser, it has been utilized for generations in Japan since the 18th century. Sounds very intriguing! yet malodorous. However, something I’ll definitely try for its known results.