Recognized Schools

The AIA is proud to present the schools listed here, as they have met the criteria for the following levels of training under AIA’s school recognition program. Completion of a minimum of the 200-hour Professional Level curriculum from an AIA recognized school will provide the educational requirement to sit for the Aromatherapy Registration Council’s registration examination. 

Learn More About the School Recognition Program

Advanced Practitioner Level Schools (Previously Clinical Level)

(minimum 400 hours of training)

  • American College of Healthcare Sciences (Oregon, USA)
  • Aromahead Institute, School of Essential Oil Studies  (Florida, USA)
  • Essence of Thyme College of Holistic Studies (British Columbia, Canada)
  • Essentially Holistic (Derbyshire, UK)
  • Holistic Care Professional School (Kobe, Japan)
  • Shaktili Aromaterapia (Mexico City, Mexico)
Professional Level Schools

(minimum 200 hours of training)

  • American College of Healthcare Sciences (Oregon, USA)
  • Aroma Apothecary Healing Arts Academy (Colorado, USA)
  • Aromahead Institute, School of Essential Oil Studies (Florida, USA)
  • West Coast Institute of Aromatherapy Inc. (British Columbia, Canada)

Foundation Level School
(minimum 100 hours of training)

American College of Healthcare Sciences (2011)
Oregon, USA

ACHS is the only accredited, AIA Level II and III professional clinical aromatherapy training available in the United States. ACHS offers the latest research in essential oil therapy. Achieve your goals with ACHS’s fully online specialized training in aromatherapy and essential oil chemistry along with a wide variety of online, professional holistic health certificate and diploma programs. On-demand CEUs available for many health professionals including RAs, RNs, and LMTs; browse our current CE offerings here: Practitioner pricing available on herbs, essential oils, and organic supplies for wellness.
Visit us to learn more and apply at or call 800.487.8839.
ACHS Academic Programs

Aroma Apothecary Healing Arts Academy (2015)
Colorado, USA

Director: Shanti Dechen, CCAP, CAI, LMT
Aroma Apothecary Healing Arts Academy offers a 200-hour Professional Program as well as a 300-hour Mastery Aromatherapy Certification Program designed to meet both the Alliance of International Aromatherapists (AIA) and the National Association for Holistic Aromatherapy (NAHA) requirements. After completion of 200-hours of study a student is eligible to take the Aromatherapy Registration Council (ARC) exam for National Registration.

Aroma Apothecary Healing Arts Academy offers professional aromatherapy certification courses for health professionals, holistic retailers and those who have an interest in aromatherapy and natural healing. 

We also offer a signature course of Integrative Medicine: Five Element Healing, Aromatherapy Teacher’s Training Program, and several other integrative wellness courses. We invite you to learn more about nature's pharmacy and natural healing methods.

Aroma Apothecary Healing Arts Academy is also a Continuing Education Provider for the National Certification Board of Massage Therapy (NCBTMB), including New York.
Contact us 888-276-6279 / outside the US 719-256-4759 
Learn more about our Programs and Courses

Aromahead Institute, School of Essential Oil Studies (2009)
Florida, USA

Andrea Butje
Aromahead Institute offers a 235-hour and 400-hour Aromatherapy Certification Program designed to meet both the National Association for Holistic Aromatherapy (NAHA) and the Alliance of International Aromatherapists (AIA) requirements, respectively. Additionally the Institute offers a 5-day Teacher Training Program, a Business Class, and several Advanced Workshops in Essential Oil Chemistry and Medicinal Blending. All Aromahead Institute classes are taught on line.

All classes provide an in-depth exploration into the art and science of essential oil therapies. Andrea Butje is approved by the National Certification Board for Therapeutic Massage and Bodywork (NCBTMB) as a Continuing Education Provider. In additional, all programs are approved in New york and Florida for CEU’s in Massage Therapy.
Call 727-469-3134 for more information
Aromahead Classes and Courses

Essence of Thyme College of Holistic Studies™ (2014)
British Columbia, Canada


Essence of Thyme College of Holistic Studies offers a comprehensive and evidence-based 600-hour Advanced Aromatherapy Certification Program.  Developed and taught by Colleen Thompson - Registered Aromatherapist with over 20 years of experience in the fields of aromatherapy, product formulation, business and adult education, and by Dr. Kelly Ablard - Registered Aromatherapist Chemical Ecologist and Zoologist with over 20 years of experience in the fields of scientific research, animal behaviour and aromatic plant conservation and sustainability.

  • Distance learning allows you to learn in the comfort of your home, and at your own pace wherever you are in the world.
  • AT101 covers 37 essential oils, 24 carriers/bases, 4 hydrosols (300 hours in length).
  • AT201 covers 46 essential oils, 12 carrier oils, 8 hydrosols (300 hours in length). 
  • Live orientation for AT101, Modules 1 – 5 when you begin the course.
  • Flexible, accessible and knowledgeable instructors to answer your questions.
  • One-on-one tutoring at no additional cost.
  • Case study and research mentors available to assist you.
  • Lab Aroma annual subscription for only $75.00.
  • Monthly live lectures to keep you up to date.
  • Talks by industry experts and guest speakers in the fields of Clinical Aromatherapy, Chemistry, Evidence-Based Research, Product Formulation, Safety, Animal Aromatherapy and Aromatherapy and Beauty.
  • Special offerings for Continuing Education Credits.
  • Student forum.
  • A wealth of resource information on the student login section of the website.
  • Graduates of the EOT program have lifetime access to all educational resources.
  • Learn more by visiting our FAQ 

Contact us today at [email protected] to begin right away!

Essentially Holistic (2017)
Derbyshire, UK

Anita James
Essentially Holistic is proud to be the first United Kingdom school offering a Level 3 online Clinical Aromatherapy course. The course is also accredited by the International Federation of Professional Aromatherapists (IFPA). Our online course also has live teaching sessions on a weekly basis where you can meet other students and enjoy their support and that of school staff but still work at your own pace. A face to face massage course is also offered taught 1 to 1 with me in Derbyshire, UK
Contact email address: [email protected]

Holistic Care Professional School (2015)
Kobe, Japan

Holistic Care Professional School (HPS) is the only school offering a two-year clinical aromatherapist course recognized by AIA as a Level Three in Japan. A one-year professional aromatherapist course is also available. HPS is a contact point for the M technique® practitioner and instructor certification in Japan. HPS offers other advanced courses such as a Reflexologist course. HPS gives lectures in many medical institutions, nursing colleges and medical schools to promote understanding about correct and safe clinical aromatherapy.
All courses and lectures are conducted in Japanese.
Contact email address:  [email protected]

Shaktili Aromaterapia (2014)
Mexico City, Mexico

Rebeca Ledersnaider
Shaktili Aromaterapia, AromAcademia, based in Mexico City, Mexico, offers a unique and specialized program  in aromatherapy, in  Spanish language, as well as  courses that complement the work of the health  professional.  In addition, also offers courses and workshops for beginners, who want to incorporate aromatherapy in their  everyday life . All classes are in person and online.

West Coast Institute of Aromatherapy Inc. (2010)
British Columbia, Canada

Beverley Hawkins, RA, DiSPE, NCTMB, BFRP
The West Coast Institute of Aromatherapy’s flexible home study programs allow students to choose how far they wish to progress with their studies. Aromatherapy 101 (170 hour program) is where everyone starts. Those wishing to become Professional Aromatherapists continue with Aromatherapy 201 (440 hours program). The Full Professional Program (Aromatherapy 101 and 201) is 610 hours and graduates are eligible to join the AIA as Clinical Members.
The Aromatherapy 301 course (120 hours) and the 3 day massage intensive are offered in a classroom setting, as are the different monthly workshops. Also available: Aroma Massage DVD and several E-Books.
West Coast Institute of Aromatherapy Courses


AIA approves applications from prospective schools with their own curriculum which are separate entities from AIA. AIA Recognized Schools have met the minimum curriculum guidelines as established by the AIA for each level. However a school may choose to teach curriculum over and above the AIA guidelines. AIA does not expressly endorse any curriculum or teachings that are outside the minimum curriculum guidelines established by the AIA. While AIA Recognized Schools are required to submit curriculum changes and/or additions upon renewal or re-filing of their listing(s), the AIA does not independently audit AIA Recognized School curriculum in between filings. An individual with a concern regarding an AIA Recognized School may file a complaint with the AIA using the form provided online.