What’s especially interesting to me is that nearly all the top herbal supplements sold are not herbs. Herbs are leaves. Spices are nearly everything else in a plant (bark, flowers, seeds, root). And plants are food: vegetables, nuts, legumes, fruits.
For the natural foods sellers, the most popular single herbal supplements were aloe, flaxseed oil, wheat grass and barley grass (the latter two are one category, and are the only herbs).
For mass market sellers, the top-selling herbal singles were cranberry, soy, saw palmetto, garlic, and echinacea. None of these are herbs, even as extracted.