Grindelia comes from the flowering tops of the plant Grindelia integrifolia. People have used it in traditional medicine for a long time, mainly to soothe the respiratory tract and support bronchial health.
You will typically find it as an extract or powder. Mix it with water or follow the directions printed on the product label. Doses vary by form so check the package.
Talk to a healthcare provider before taking it, especially if you are pregnant, nursing, or on prescription medications.