However, it is still important to ask companies making standardized herbal products about their product's guarantee.
No organization or agency regulates the manufacture or certifies the labeling of herbal preparations. This means you cannot be sure that the amount of the herb contained in the bottle, or even from dose to dose, is the same as what is stated on the label. Some herbal preparations are standardized, meaning that the preparation is guaranteed to contain a specific amount of the active ingredients of the herb. However, it is still important to ask companies making standardized herbal products about their product's guarantee. It is important to talk to your doctor or an expert in herbal medicine about the recommended doses of any herbal products.