Aromatherapy Foundations: Essential Oil Science Levels 1 & 2
A beginner-friendly introduction to essential oils from Essence of Thyme College of Holistic Studies.
Learn the real science behind aromatherapy, get to know six foundational essential oils inside and out, and build your first hands-on blends — with real chemistry and safety training, not guesswork. Module 1 is free to start.
 Build a Stronger Foundation in Using Essential Oils
Essential oils are widely available, but reliable education about their chemistry, safe use, and formulation is not always easy to find.
Aromatherapy Foundations introduces the principles behind responsible essential oil use in a way that is clear, practical, and approachable. You will learn how essential oils work, how to evaluate them through sensory and scientific information, and how to make informed choices when creating simple aromatic products.
The course combines essential oil science, sensory learning, safety calculations, and hands-on blending. Instead of relying on general recipes or online advice, you will begin developing the knowledge needed to understand why an oil is selected, how much should be used, and how it can be formulated safely.
The complete Aromatherapy Foundations course is $79 CAD.
Module 1 is free, so you can explore the course before enrolling in the complete program.
Â
Â
Started with Aromatherapy Foundations Level 1 Module for FREE
Â
Enrol Now
What You'll Learn
Throughout this introductory course, you will:
- Learn the essential principles of aromatherapy and responsible essential oil use
- Study six foundational essential oils through their aromas, chemistry, properties, and practical applications
- Develop your sensory awareness and learn how to create an aromatic profile
- Understand what a GC/MS report can tell you about an essential oil
- Learn essential oil safety principles and calculate appropriate dermal dilutions
- Create your first practical aromatic products using guided formulations
- Build a solid foundation for continued study in professional aromatherapy
CLEAR VIDEO LESSONS
Learn essential oil science through beginner-friendly, self-paced instruction from Kathleen Jaggassar.
SIX ESSENTIAL OIL STUDIES
Explore the aroma, chemistry, properties, uses, and safety of six foundational oils.
HANDS-ON APPLICATION
Complete sensory exercises and create practical aromatherapy blends at home.
SAFETY AND FORMULATION
Practise dermal dilution calculations and learn to formulate with care, not guesswork.
Check out the full course
Explore the vast topics you'll learn about in the Aromatherapy Foundations course by clicking each box, below.
Here are some practical ways you’ll build your skills
Six foundational essential oils you'll study
What does the whole course cover
Take Advantage of CAD Pricing
With our courses priced in Canadian dollars, the conversion rate makes our offerings extremely high value for their price.
The Aromatherapy Foundations Course is CA$79 only. Use the converter below to see the investment based on your local currency!
Check Currency ConversionsThe Aromatherapy Foundations: Essential Oil Science Levels 1 & 2 course, taught by Kathleen Jaggassar, includes beginner-friendly video lessons, downloadable learning resources, essential oil studies, and practical blending activities.
Through this self-paced course, you will explore six foundational essential oils while building essential knowledge of aromatic profiling, chemistry, GC/MS reports, safety, dermal dilution, and formulation.
Hands-on exercises will help you develop your sensory awareness, practise dilution calculations, and create your first aromatic blends and products with greater confidence.
UPDATES INCLUDED: Your enrolment includes access to future updates made to the course, so your learning materials remain current and relevant.
No previous aromatherapy experience is required. Level 1 is free to begin, and the complete course is available for $79 CAD.
Kathleen Jaggassar, MA, RCC, is President of the Canadian Alliance of Aromatherapy and Partner and Co-Principal at Essence of Thyme College of Holistic Studies.
Kathleen brings together experience in counselling psychology, mental health, professional aromatherapy education, and more than two decades of analytical leadership with the Canadian federal government. Her work focuses on aromatic neuro-regulation, autonomic resilience, evidence-informed curriculum development, and the responsible use of essential oils.
Through clear instruction and practical application, Kathleen helps students understand the reasoning behind their aromatic choices instead of relying on general advice or guesswork.
Deepen your aromatherapy journey with one of Canada’s Leading Aromatherapy Educators
Colleen Thompson, Cert. Ed., MIFPA, RA®, EOT®, CA, is the founder of Essence of Thyme College of Holistic Studies and an internationally respected aromatherapy practitioner and educator with more than 30 years of experience.
Throughout her career, Colleen has helped establish higher standards for aromatherapy education, professional practice, and clinical training. Her work has supported students and practitioners around the world in developing the scientific knowledge, practical skills, and professional judgement required to use essential oils responsibly.
Essence of Thyme reflects her belief that credible aromatherapy education should be rigorous, evidence-informed, and accessible at every stage of a student’s development. Aromatherapy Foundations offers beginners the opportunity to start with that same standard of education through a clear and approachable introduction to essential oil science, safety, and practical use.
Aromatherapy Foundations
Still have questions? Find your answers below!Â
