Diploma in Aromatherapy Master Aromatherapist


This advanced Diploma program is an in-depth study of the science and art of aromatherapy. Students study essential oil materia medica including botanical information, identification, sources, historical uses, parts used, cultivation, harvesting, production, characteristics, active constituents, therapeutic actions, medicinal uses, evidence-based uses, household uses, and perfumery. Students also study anatomy and physiology including holistic clinical correlates covering a wide range of integrative health modalities from aromatherapy and herbal studies to nutrition and wellness protocols. Students also study aromatherapy chemistry and the steps to set up a business.


Meets the National Association of Holistic Aromatherapy education standards for Level 3: NAHA Certified Clinical Aromatherapist (NCCA)®️ membership.*

*Graduates must also complete a college-level pathophysiology course

Qualify to sit the national registration exam with the Aromatherapy Registration Council and become a Registered Aromatherapist (RA)

Meets the curriculum requirements of the Alliance of International Aromatherapists’ Advanced Practitioner Aromatherapy education standards

ACHS Aromatherapy graduates have a five year (2012-2016) success rate of 100% on the Aromatherapy Registration Council National Exam leading to registration as a Registered Aromatherapist

Learning Outcomes

  • Explain modern and historic aromatherapy definitions, theories, practices, and methods of essential oil extraction and quality assessment.
  • Communicate human anatomy, physiology, and medical terminology in the professional practice of aromatherapy.
  • Assess essential oil constituents to formulate aromatherapy blends by evaluating their aroma, therapeutic actions, toxicity, pharmacokinetics, and pharmacodynamics (aroma, how they move through the body, and how they work)
  • Recall essential oil botanical names, constituents, therapeutic actions, drug interactions, contraindications, toxicology, and methods of administration to develop safe and effective aromatherapy formulations.
  • Compose evidence-based case study reports and literature reviews to contribute to the professional field of aromatherapy.
  • Apply informed consent, intake skills, scope of practice, assessment skills, and aromatherapy protocols to design evidence-based aromatherapy wellness plans.
  • Develop the components of an aromatherapy business to effectively implement record keeping, required insurance, scope of practice, ethics, legal considerations, marketing, and networking.

Career Goals:

  • Aromatherapist, Registered Aromatherapist (RA)
  • Aromatherapist, Aromatherapy Consultant, or Aromatologist
  • Aromatherapy Product Formulator & Manufacturer

Current Instructors:

View all ACHS instructors, including bios, photos, and courses taught.

Admissions Requirements:

Minimum of a high school diploma or equivalency and recommendation for admission by the ACHS Admissions Committee.

Tuition and Fees:

To estimate the program tuition and fees, click on the required course name to view each Total Course Price. Information is also provided in the Program Fact Sheet.

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