Used with care
Coumarin is a sweet-smelling chemical compound naturally found in some species of plants, including the tonka bean, vanilla grass and cinnamon, and can also be synethesized.
EWG score: The EWG score is a hazard score ranging from 1-2 (low hazard), 3-6 (moderate hazard) and 7-10 (high hazard) published by the Environmental Working Group. Their data is sourced from the Skin Deep® database and studies published in open scientific literature.
4 - 7 (depends on usage)