Yerba Santa is a flowering plant native to the western United States. Indigenous peoples have long used its leaves for respiratory support. The leaves contain flavonoids and other compounds that help soothe the throat and bronchial passages. It acts as an expectorant, helping clear coughs and congestion.
You can take it as a tea, tincture, or extract during cold and flu season or when you have respiratory discomfort. Side effects are rare, but some people have allergic reactions. It may also affect blood pressure.