#1 The Serum
This sophisticated serum supports skin barrier defence with a proprietary Complex of B-Group vitamins, restoring radiance as it amplifies hydration.
Most suitable for combination skin types.
Use in the AM.
Complimentary shipping on all orders.
The Ritual
Dispense 2–3 drops into palm.
Smooth gently over face, neck, décolletage and backs of hands.
Inside The Formulation
Every RATIONALE Formulation is crafted with the highest quality of ingredients, formulated into three key Complexes.
The Essential Six System
The Results
91%
reported improved skin hydration.
82%
saw a boost in radiance.
82%
experienced enhanced skin nourishment.
*Based on a 56-day trial with 22 participants
The Research
The skin has its own immune system, with specialised tissues and cells playing a vital role in preventing environmental damage, allergy and disease.
The concept of skin immunity and beauty are exquisitely linked, with a healthy, resilient skin reflected in a clear and even complexion.
The vital processes of cell-to-cell communication and skin barrier function are supported by B-group vitamins and the phospholipid-protein structures of skin’s outermost layer, the Stratum Corneum.
In Synergy With
#2 The Serum
Benefits
Hydrates, Visibly brightens, Evens tone,
#6 The GelCrème
Benefits
Enhances radiance, Visibly firms, Evens tone, Hydrates,
#3 The Enriched Crème SPF15
Benefits
Nourishes, SPF protection, Visibly calms,
#3 The Tinted Serum SPF50+
Benefits
Evens tone, Illuminates, SPF50+ protection,
Frequently Asked Questions
#1 The Serum is applied first in your morning (AM) ritual, before Hydragels and Crèmes, and after rinsing your skin with warm water.
Yes, #1 The Serum is suitable for all skin types.
This unique Complex of B-Group Vitamins boosts skin immunity by enhancing the resilience of skin cells and strengthening the barrier function. Skin appears calmer as redness and irritation are reduced.
The key ingredients in #1 The Serum include a B-Group Vitamin Complex including Niacinamide, with a combination of strengthening vitamins and peptides.
Niacinamide strengthens the skin’s barrier, enhances immunity, and restores resilience. With its anti-inflammatory properties, niacinamide visibly soothes redness and brightens uneven skin tone for a healthier complexion.
The B-group Vitamin Complex found in the Resilience Collection delivers a broader range of benefits to the skin compared to Niacinamide alone. This enhances the Formulation's ability to target various skin types and conditions.
Yes, we’re excited to introduce #1 The Serum 15mL travel size as a permanent offering.
#1 The Serum supports skin barrier defence with a Complex of B-Group Vitamins, while #2 The Serum defends skin from oxidative stress with a Complex of Antioxidants. It is recommended to use one Formulation from #1 The Resilience Collection and one from #2 The Vitality Collection to optimise skin health.
A serum is primarily water-based, offering a light consistency and quick delivery. On the other hand, hydragels, although lightweight, contain a combination of water and oil, resulting in a slower delivery in comparison.
Yes, #1 The Serum can be used during pregnancy and breastfeeding, especially for those experiencing signs of dehydration, blemishes, and congestion.