Here is a list of soy's properties and how they can positively affect you. Lets start with herbs. Herbs are grown all over the world in different climates, with different amounts of rainfall, different nutrients in the soil, as well as different levels of toxins. They can be grown organically or with chemical pesticides and fertilizers. If they are imported herbs they may go through irradiation and gassing to kill bacteria, mold and other potential contaminants.
Some herbs are wild crafted and some are farmed.
Wild crafted herbs are grown and harvested naturally in the wild which accounts for the wide variations in potency and quality you find with these herbs. If you've ever grown a backyard garden you should understand what I mean. Sometimes the corn grows six feet high and other times it grows only three feet tall. Sometimes the watermelon is sweet, and sometimes it is nothing special. Much depends on your starting raw materials.