- Medical Herbalist Martin Watt provides an aromatic extract safety manual and articles about conservation, education, toxicity, therapeutics, and production.
- Australian site offering information on the sense of smell, how aromatherapy works, essential and carrier oils, some blending recipes, and safety information.
- Information provided by the University of Minnesota’s Center for Spirituality and Healing. Includes articles about how essential oils work, research, safety, and finding an aromatherapist.
- Information for aromatherapists and students, including essential oil profiles, recipes, and articles. Oils, beauty, and well-being areas are searchable by sub-topic.
- Provides information about production of essential oils, articles addressing misconceptions about aromatherapy, book reviews, courses, workshops, projects, and consultant services.