Echinacea ??? I honestly don't know. Both Echinacea purpurea AND Echinacea angustifolia are juuuust about as effective - most give the edge to angustifolia (that's why I use both in ours).
I don't understand what they mean by "bioactivity per dose 2.1mg). That kinda sounds like it could be a standardized extract, and that wouldn't be good at all.
I'd like to see her have at least 2oz of something I'm sure is really effective (of course, 4 oz would be better).
If you want to have me give you a better idea before you order any from me, have her put 3 individual drops on her tongue and report to you EXACTLY what she feels, how the intensity of what she feels rates on a scale of 1-10, and how long she feels it...and get back to me.