Aromatherapy I Online


AROMA 503 takes students to the next step in their aromatherapy training, looking deeper at the historical uses of aromatherapy and the modern scientific research being carried out in this fascinating modality. Students study methods of administration for essential oils in more depth than AROMA 501, as well as the anatomy and physiology of the related body systems.

Learning Outcomes

  • Describe and discuss aromatherapy, including its historical basis

  • Locate, review, and discuss current research using full-text reference materials and online databases

  • Demonstrate ways to locate developing essential oil and applied research

  • Demonstrate an understanding of the basic principles of a research study

  • Apply research methodology and terminology

  • Identify the components of a research paper and the process involved

  • Identify and discuss the anatomy and physiology of the olfactory, skin, and muscular systems, and the influence of aromatic molecules on each

  • Assess essential oil quality and be able to describe the primary production methods of essential oils

  • Discuss how essential oils interact on physical and emotional levels

  • Understand the chemistry of essential oils and the physiological effect and pathway of individual chemical components

  • Compose aromatherapy blends for therapeutic purposes, perfumery, cosmetics, and soap making

  • Use a full range of methods of administration

  • Locate clinical scientific studies examining the use of essential oils

More details

Required Course Pack: 

  • ACHS eTextbook: Petersen, D. (2020). Aromatherapy Materia Medica: Essential Oil Monographs (20th Edition). Portland, OR: American College of Healthcare Sciences. (Optional: Printed copy available for an additional fee)
  • ACHS eTextbook: Petersen, D. (2023). Aromatherapy and the Body Systems: A Therapeutic Guide. (1st Edition). Portland, OR: American College of Healthcare Sciences. (Optional: Printed copy available for an additional fee)
  • Online Materials and Library Resources (OMLR)
  • AROMA Case Study Companion Kit I

The AROMA Case Study Companion Kit I includes the following experiential learning supplies: 

  • 2 oz Organic Aloe Vera Oil
  • 2 oz Apricot Kernel
  • 2 oz Organic Camellia Oil
  • 2 oz Wheat Germ
  • 24 oz total of Organic Sweet Almond Oil. *Your kit may contain more than one bottle with different sizes for practical assignments.*
  • 4 oz Baking Soda
  • 4 oz Epsom Salts
  • 2 oz Citric Acid
  • 2 oz Corn Starch
  • 2 oz Mineral Bath Salts – Coarse
  • 2 oz Mineral Bath Salts – Fine
  • 1/2 oz White Clay
  • Nasal Inhalers (Qty 3)
  • 10 ml roll-on bottles (Qty 3)
  • 2 oz Cobalt Bottles w/ spray tops (Qty 2)
  • 1 oz Amber Bottle w/Dropper Top (Qty 3)
  • 5 ml Amber Bottles (Qty 5)
  • Perfume Testing Strip Booklet
  • Calendula Flowers 1 oz Organic Calendula Officinalis
  • St. John’s Wort Herb 1 oz Organic Hypericum perforatum

This Practical Lab kit also includes the following certified organic or sustainably wildcrafted essential oils:

Note, all essential oils are 5 ml bottles unless otherwise indicated:

  • Bergamot Citrus aurantium var. Bergamia
  • Eucalyptus Eucalyptus globulus
  • Ginger Zingiber officinale
  • Juniper Berry Juniperus communis
  • Lavender Lavandula angustifolia
  • Lemon Citrus limonum
  • Cardamom Elettaria cardamomum
  • Marjoram Origanum majorana
  • Rosemary Rosmarinus officinalis ct. Cineole
  • Tea Tea Australia Melaleuca alternifolia
  • Ylang Ylang Cananga odorata var. Genuina
  • Sweet Orange Citrus sinensis
  • Peppermint Mentha xpiperita var. Black Mitcham
  • Chamomile Roman Chamaemelum mobile 
  • Neroli Boswellia carterii ct. α-pinene (2 ml)
  • Frankincense Citrus aurantium var. amara (2 ml)

Required Textbooks: 

View the required textbooks for this class, including ISBN, edition, and retail price, by visiting our Required Textbooks page.

Total Course Price:

View the total course price, including tuition, fees, course materials, and shipping online here.

None – Prior formal aromatherapy training recommended

Current Instructors:

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Admissions Requirements:

Candidates must possess a baccalaureate degree or higher from an institution accredited by an agency recognized by the US Department of Education. Candidates must submit official transcripts directly from the issuing institution along with one professional letter of recommendation. All applicants must be recommended for admission by the ACHS Admissions Committee.

Total Course Price:

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