Therapeutic Formulation
Deana Kassim
22/07/2026
14/08/2026
Purodem® Journal
Working with plant materials as a discipline in its own right, where the materials are understood together and chosen for what a particular person actually needs. From the therapeutic use of essential oils through to formulating for the individual.
Essential oils in one place, carrier and vegetable oils in another, hydrolats and plant actives somewhere else again: plant materials have long been studied one tradition at a time. Therapeutic formulation is the craft of bringing them together, understanding how they behave alongside one another, and putting them to work for what a particular person actually needs.
This section gathers the thinking behind that craft, from the therapeutic use of individual essential oils through to formulating for a specific person and purpose. Some articles are an accessible way in; others go deeper into method and materials.
Start with What Is Integrative Therapeutic Formulation? for the foundations, then explore the articles below.
Integrative Therapeutic Formulation, developed by Purodem’s Deana Kassim, is the discipline that gives this way of working its structure, and the qualification that teaches it.
There’s a point, once you’ve been formulating for a while, where you start growing a regular, client-facing practice, with people
There’s a real satisfaction in making something for one person and getting it right. Not buying a base product off
Many people first learn to formulate by making products. A balm, a cream, a facial oil. You choose the formulation,
Everything here feeds what we teach. If you want to move from reading to formulating, our courses take you from first principles to your own finished work.
Read about ITF — Coming September 2026, a new qualification in therapeutic formulation.
View the NSF Diploma — beginner-friendly, the route into cosmetic formulation.
View the PEOT Diploma — advanced, for practitioners taking essential oil work deeper.