About Rationale

Since 1992, RATIONALE has delivered Luminous Skin for Life with a luxurious suite of formulations and treatment experiences that enlighten and transform.

From their world-leading research laboratory at RATIONALE HQ in Melbourne, RATIONALE remains compelled to develop superlative formulations which offer unparalleled environmental skin protection and repair, restoring natural beauty and radiance.


The essential Six Collections have been crafted around the six facets of skin luminosity: Resilience, Vitality, Brilliance, Integrity, Clarity and Renewal.

Every RATIONALE Ritual is built upon these six facets and is tailored to your unique skin needs.

The ultimate expression of a profound understanding of human skin, world-leading Australian solar research and Skin Identical technology, this suite of definitive formulations works synergistically with skin—and each other—to offer nourishing protection by day and revitalising repair at night, reanimating skin’s natural radiance.

The result is Luminous Skin for Life.

About Essential Six

The cornerstone of the RATIONALE range is the Essential Six Collections—a system built around the six facets of skin health and luminosity, and acknowledged worldwide as the definitive skincare for skin protection and repair, restoring natural beauty and radiance.

Tailored to every individual’s skin, an Essential Six Ritual acts as the skin’s daily nutrition, providing all the Skin Resilience Boosters, Antioxidants, Environmental Protection, Barrier Fortification, pH Recalibration and Nightly Repair needed for skin to glow with radiant health.

By day, the Essential Six ritual offers vital support to skin’s innate resilience, antioxidant nourishment to boost skin vitality, and delivers comprehensive protection from the entire Solar Constant—made up of ultraviolet, visible light and infrared radiation—as well as against pollution and other environmental aggressors.

By night, the Essential Six evening routine works to repair and reverse daytime damage by replenishing the skin’s lipid barrier and recalibrating skin’s pH to a healthy, acidic level. Repair processes are supported for overnight rejuvenation and cellular regeneration for a visibly more luminous complexion by morning.

Product Range


Our approach is centred on personalisation. An initial consultation will ensure we can offer you bespoke, medically-backed guidance around which customised treatments will enable you to achieve long-lasting natural, targeted results, and healthy glowing skin.