Christopher Hobbs is a licensed acupuncturist and 4th-generation herbalist with 30 years of experience. He teaches classes on herbal healing at universities and medical schools.
Leslie Gardner has a master's degree in herbology, was garden manager at the California School of Herbal Studies (the oldest herb school in America) for 19 years, and has been the Director of the Sonoma County Herb Exchange (which supplies supplement manufacturers) for 13 years. They live in Davis, CA.