20% OFF FULL PRICE
CODE: FF20
£0 today, then 3 instalments of £45.33, interest free when you choose a 3 month plan.
Colour:
Not Applicable
Size:
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Description
Product code: 917927
For calm, hydrated skin, Rationale's No1 The Strengthening Serum leads with Niacinamide, the hero active in a proprietary B Group Vitamin Complex that helps even tone and improve clarity. The fluid texture forms the first layer of a day routine.
Product Highlights
- Ceramide NP and Squalene strengthen the barrier against moisture loss
- Acetyl Octapeptide-3 peptide addresses fine lines and wrinkles
- Ascorbyl Glucoside, a stable Vitamin C derivative, restores radiance
- Native Australian botanicals including Kakadu Plum supply antioxidants
- 91% reported improved hydration in a 56 day trial
- Fragrance and essential oils provide a botanical scent; patch-test first
Best For
- Morning routines for dehydrated skin prone to congestion
- Pregnancy and breastfeeding, when formulas must stay gentle
- Sensitive skin that flares under stronger actives
- Gifting to someone deep into skincare
Delivery & Returns
-
Next Day Delivery - £11.99
Delivered next day by DPD (excludes Public holidays).
Order by 9pm. -
Express Delivery - £9.99
Delivered within 48 hours (excludes Public holidays).
Order by 9pm. -
Standard Delivery - £6.99
Delivered within 3-7 days (excludes Public holidays).
Christmas Gift Returns
- Our extended Christmas returns policy runs from 26th October 2026 until 4th January 2027. All items purchased online during this time can be returned for a full refund.
- View our full Christmas Gift Returns Policy.
Returns and Exchanges
- You can now return your online order in a few easy steps. Select your preferred tracked returns service. We have print at home, paperless and collection options available.
- You have 28 days to return your order from the date it’s delivered. Exclusions apply.
- If you've had items delivered to you from one of our brand partners please see additional information in regards to returning those items on our Online Returns Page.
- Please note: Unfortunately certain items cannot be returned. For more information please visit our Returns and Exchanges Policy.