#5 The Milk Concentrate
#5 The Milk Concentrate
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The Clarity Collection
Clarity. Balance. Radiance.
The Story
Profound clarity and radiance.
A gently nourishing milk concentrate that resets skin’s pH to a healthy balance while promoting skin calmness.
This formulation promotes skin refinement to fortify barrier function, amplifying moisture levels and enhancing skin resilience to radiant effect.
The Promise
• Calms, clarifies and rejuvenates skin
• Gently recalibrates skin pH to enhance ongoing clarity
• Supports skin resilience
• Skin feels hydrated, softer and more supple
• A more radiant tone and texture is revealed
The Ritual
Smooth gently over face, neck, décolletage and backs of hands each evening.
Follow with your RATIONALE Essential Six formulations for night.
The Research
A vibrant, radiant complexion is intimately connected to the pH of the skin’s outermost layer, the Stratum Corneum.
Sensitivity, barrier breakdown, pigmentation and premature ageing are all consequences of environmental damage. These occur as a result of excessive solar exposure, causing the skin’s pH to shift from a healthy acidic state to alkaline, triggering the upregulation of enzymes that break down connective tissue and erode protective barrier structures.
Signalling peptides in human skin direct all metabolic processes, including desquamation (cell turnover), cellular differentiation (cellular function), and hydration. Short-chain protein sequences and ceramides are critical in these intercellular communication processes.

bisma's take
she's not just a hydration serum. she is a complete skin corrective treatment. it is DREAMY for those that need extra hydration support or cannot tolerate actives.
the skin protocol
the skin protocol
the full ingredient list
the full ingredient list
about rationale
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 Kyneton, 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 revitalizing 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.
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