30 Years of #1 The Serum

Glow-on-the-go with a new travel-friendly size of our best-selling Niacinamide serum.

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Over 30 years of world-leading skincare innovation, our luxury Formulations of the highest quality ingredients work to protect by day, and repair by night.

Your Introduction

Unmasking an All-New Size

Introducing the new 20mL size of our luxurious masks—designed to enhance the experience of multi-masking and target various skin concerns simultaneously.

Unmasking an All-New Size

#1 The Mask

#1 The Mask

Illuminating mask for resilient skin types.

$118.00

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#2 The Mask

#2 The Mask

Rejuvenating mask for combination skin.

$122.00

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#5 The Mask

#5 The Mask

Clarifying mask for resilient skin types.

$118.00

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Discover Your Ritual

Complete our Skin Questionnaire to receive a personalised Ritual prescribed to you.

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Award-Winning Solar Protection

Oprah Daily Sun O-wards 2024

#3 The Tinted Serum SPF50+ has been voted the Best Serum with SPF at the inaugural Oprah Sun Awards.

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Shop by Skin Concern

Hyperpigmentation

Dryness

Fine Lines + Wrinkles

Sensitivity + Redness

Congestion

Journal

30 Years of Glow

For three decades, our bestselling #1 The Serum has bestowed the signature RATIONALE Glow, strengthening skin barrier function, amplifying hydration and restoring radiance—a true RATIONALE icon.

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Metro Same Day Delivery
30-Day Returns
Click + Collect from Flagship
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