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Rationale

#1 The Serum

$206.00
$206.00
Shipping calculated at checkout.
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Rationale’s #1 The Serum is a sophisticated, calming serum designed to nurture skin resilience. Infused with a proprietary B-Group Vitamin Complex, it soothes irritation, strengthens the skin barrier, and enhances hydration. This serum is perfect for promoting a radiant and clear complexion, providing nourishment and boosting natural luminosity.

My Benefits
  • Calms and soothes irritated skin
  • Strengthens the skin's barrier function
  • Enhances hydration levels
  • Improves skin tone and clarity
  • Amplifies natural radiance
skin Suitability
  • Dry skin
  • Normal skin
  • Combination skin
  • Oily skin
  • Sensitive skin
How to use me

Dispense 2–3 drops into your palm. Gently smooth over the face, neck, décolletage, and the backs of your hands. Follow with RATIONALE’s Essential Six formulations for day. For best results, use in the morning as part of your daily routine​
My Key Ingredients
  • Niacinamide: A B-vitamin that helps reduce inflammation, soothe irritation, and strengthen the skin’s barrier.
  • Sodium Hyaluronate: A form of hyaluronic acid that helps retain moisture, keeping the skin plump and hydrated.
  • Ceramide NP: Strengthens the skin’s natural barrier and prevents moisture loss.
  • Squalene: Provides hydration and supports the skin’s natural barrier.
  • Collagen Amino Acids: Help promote skin elasticity and firmness​.
All of My Ingredients

Rosa Damascena (Rose) Flower Water, Niacinamide, Glycerin, Pentylene Glycol, Aloe Barbadensis (Aloe Vera) Leaf Juice, Aqua (Water), Methylpropanediol, Coco-Caprylate/Caprate, Glyceryl Stearate Citrate, Cetearyl Alcohol, Caprylyl Glycol, Olive Oil Decyl Esters, Xanthan Gum, PEG-40 Hydrogenated Castor Oil, 
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    EASY RETURNS 30-day postage paid returns

    The 'YOU' Guarantee

    • Quality

      Medical-grade, science-backed skincare solutions.

    • Doctor-Led

      Expert care from trusted professionals.

    • Fast Shipping

      Fast, reliable delivery to your doorstep.

    • Support

      Friendly, dedicated customer care team.

    FAQs

    Do you offer flexible payment options?

    Yes! We accept Afterpay, Zippay, TLC finance, Visa, Mastercard, and cash in-clinic for easy and secure payments.

    How can I receive my order?

    We deliver Australia-wide and internationally, plus offer free local pickup at our Forresters Beach and Newcastle locations.

    How long does shipping take?

    Standard shipping within Australia typically takes 2–5 business days, and express delivery takes 1–3 business days, depending on your delivery location​.

    What if I don't know which products I need?

    Try our online Skin Quiz! It’s a quick and easy way to discover products tailored to your skin type and concerns.