Ideally most herbs aid the body to cleanse and or supply plant based minerals. A few grams of herbs are normally not enough to counter the 3 meals per day, etc. Dr. Christopher had 1 theory, take the herbs until they work, if you threw up, he said great, now we have a clean stomach for more herbs. I will take a guess that 99.99999999999% of herb use fails because the dose is so small in comparison to the other daily intake of food.