The Refining Collection

Hydroxy Acid and Peptide Complexes designed to maintain skin pH and refine tone and texture each night.

Frequently Asked Questions

What is The Refining Collection?

The Refining Collection is the second of our evening essential collections, harnessing Hydroxy Acids and Peptides to maintain skin's pH and refine the look and feel of skin clarity. The formulations work to gently support renewed skin turnover, refine the appearance of texture, and restore radiance – without compromising the barrier. The Refining Collection is the bridge between the Nourishing and Rejuvenating steps of any evening ritual.

What are Hydroxy Acids (AHAs and BHAs)?

Hydroxy Acids are a family of acids that gently dissolve the bonds between dulling surface cells, supporting cellular turnover and revealing a smoother, more radiant complexion. Alpha Hydroxy Acids (AHAs) such as Lactic and Glycolic Acid are water-soluble and work on the skin's surface. Beta Hydroxy Acids (BHAs) such as Salicylic Acid are oil-soluble and penetrate deeper into the pore.

Who is The Refining Collection suited to?

The Refining Collection is recommended for those addressing the appearance of uneven texture, dullness, congestion, or early visible signs of ageing. It is suitable for resilient skin types and well tolerated by most clients when introduced gradually. Sensitive skin types are encouraged to begin with low #5 The Refining Milk Concentrate or #5 The Refining GelCrème to support comfort and build resilience. Our Client Services Team can help guide you further.

When should I apply Refining formulations?

The Refining Collection is formulated for evening use, applied after cleansing and before your Rejuvenating Night Crème or GelCrème. The formulations work optimally overnight, when the skin's renewal processes are most active. We recommend starting with two to three evenings per week and increasing frequency as tolerance builds.

Are Hydroxy Acids safe for sensitive skin?

Yes, when introduced gradually. RATIONALE Hydroxy Acid formulations are paired with skin-comforting ingredients to support tolerance. We recommend beginning with two evenings per week and layering with Nourishing formulations such as #6 The Rejuvenating Night Crème to maintain barrier comfort. Always pair with daily SPF, as Hydroxy Acids can increase sensitivity to solar damage. As an alternative, reach for #5 The Refining Milk Concentrate; a gentle, comforting emulsion that harnesses peptides and Microbiome Complex to support skin pH and promote visible clarity for skin that does not tolerate Hydroxy Acids very well.

Can I use Refining formulations with retinol?

Yes. The Refining Collection (Hydroxy Acids and Peptides/Microbiome Complex) and The Rejuvenating Collection (Vitamin A, Bakuchiol and DNA Repair Enzymes) work in synergy within the evening ritual to support renewed skin turnover and visible skin clarity. We recommend introducing one active at a time to assess tolerance. Layering after Nourishing formulations helps maintain comfort and barrier resilience.

How often should I use The Refining Serum?

We recommend introducing #5 The Refining Serum two to three evenings per week, gradually increasing to nightly use as tolerance builds. Always apply daily SPF the following morning, as Hydroxy Acids can increase the skin's sensitivity to solar and environmental damage. For tailored guidance, consult our Client Services Team or a RATIONALE Skin Therapist at one of our Flagship locations.

Skin clarity is not simply the absence of congestion — it is the result of a surface that renews at the right pace, maintains the optimal skin pH, and allows the actives layered above and below it to work without interference.

The Refining Collection exists to restore and maintain this equilibrium: a suite of Hydroxy Acid, Microbiome Complex and Peptide-rich formulations that gently recalibrate the skin's surface, remove the cellular accumulation that dulls and congests, and support the progressive clarity that comes from a consistent, well-considered ritual.

Every formulation in this collection works through ongoing support and progressive revitalisation rather than aggressive intervention. Hydroxy Acids dissolve the bonds between dead skin cells, encouraging natural turnover without disrupting the barrier. A sophisticated Microbiome Complex maintains optimal pH for reactive skin types. Peptides support firmness and tone. Together, they form the fifth pillar of the Essential Six Ritual — the evening step that refines what the day has accumulated and prepares skin for the renewal that follows overnight.

For resilient skin types, #5 The Refining Serum is ideal, offering a concentrated overnight formulation that visibly smooths uneven tone and texture, refines pore appearance, and promotes a more luminous complexion. #5 The Refining Milk Concentrate offers a calming, gentler alternative for combination and more reactive skin types, while #5 The Refining GelCrème provides a clarifying, lightweight texture suited to oilier complexions. For those seeking active cleansing, #5 The Refining Cleanser delivers Hydroxy Acid recalibration from the very first step of the evening ritual while nurturing skin with barrier-fortifying ceramides.

To find the Refining formulation suited to your skin type, take our Skin Questionnaire or book a consultation

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