Participants in one trial took 40 milligrams (mg) of either Echinacea angustifolia or a placebo twice daily for one week before a period of three weeks of not receiving anything. According to the ...

There are several species of echinacea, including Echinacea angustifolia, Echinacea purpurea, and Echinacea pallida. Each species has unique properties and benefits. It’s important to choose a ...