Echinacea

Three species and two plant parts get sold under the one name, and they don't behave the same.

Also called Echinacea purpurea, Echinacea angustifolia, Echinacea pallida, Purple Coneflower, Coneflower, Black Sampson

The item

Three squares: proven in human trials. Two: a strong signal. One: early human data. Striped: the trials disagree.

Emergency: call 911.

I am not a doctor. This is not medical advice. This is self-education. Talk to a physician who has your history before you change anything.