(5) Some herbs are prone to adulteration, substitution, or both. For example, Ling Zhi Cao (Cordyceps) can be substituted with an inactive form of the herb. If an extract is first made with water, the herb will be tasteless when dried and re-used/recycled. On the other hand, the genuine Ling Zhi tastes bitter, but few consumers would know the difference, especially if the herb is mixed in a prescription and boiled together with other herbs. The pharmacists themselves may not be aware, as some may trust their suppliers implicitly, and do not conduct regular testing.