Be like me. Use Amazon to find things, then buy directly from the seller.
They were wise. We can be too, and pass on remedies. Cures are all around us in nature. I’ve been making pine needle tea (strobus) and alternating with my vit c tablets. Once I run out, I can scratch the tablets and not reorder. Feels good to research and slowly wean off the grid, so to speak. The previous anon was correct about yarrow too.
I urge people to research in different books, don’t rely on a few, just for safety’s sake.