What it is: Also known as arnica, it is a perennial plant that looks like daisy, with flowers that have yellow petals and an orange center, and it blooms in Europe, Siberia and North America. How it works: The extract of arnica has been reported to have antibacterial, anti-cancer, antioxidant, anti-inflammatory, antifungal and immunomodulatory activity. It contains a wide range of chemical compounds, including sesquiterpene lactones and esters of short-chain carbonic acid, flavonoids, carotenoids, essential oils, coumarins, of phenolic acids, etc.In which products you can find it: