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Klairs Blue Youth Activating Drop (50ml)
Klairs Blue Youth Activating Drop is a calming, watery serum for skin that gets red, reactive or breakout-prone and is starting to show the first fine lines. It's the renamed, repackaged version of Klairs' Midnight Blue Youth Activating Drop, with the same formula: EGF and FGF peptides at 10 ppm each, blue guaiazulene and blueberry extract, in a short, fragrance-free list of 15 ingredients. What it doessh-Oligopeptide-1 (often called EGF) and sh-Polypeptide-1 (FGF) are lab-made peptides that Klairs use for the look of firmer, smoother, more resilient skin. Guaiazulene, the blue compound found in chamomile, helps skin feel calm, blueberry extract adds antioxidant care, and adenosine works on the look of fine lines. Why we chose itIt's one of the gentlest serums we know: no fragrance, no essential oils and no alcohol, with a watery texture that disappears into skin. That makes it an easy first serum for a reactive routine, and an easy one to add before anything richer. Best forSkin that gets red, reactive or easily upsetBreakout-prone skin that needs a calm serumThe first fine lines in sensitive skinA first serum right after cleansing or tonerNot ideal ifYou want a rich, cushiony serum: this one is watery and lightKey ingredientssh-Oligopeptide-1 (EGF) 10 ppm: the look of firmer, smoother skinsh-Polypeptide-1 (FGF) 10 ppm: the look of resilienceGuaiazulene: helps skin feel calmBlueberry extract and adenosine: antioxidant care and the look of fine linesTexture and finishA weightless, water-type serum in a 50 ml amber glass dropper bottle. Klairs say it absorbs instantly. Where it goes in your routineThe first step after cleansing, or after toner, morning and night. Press 3 to 4 drops into skin, then follow with thicker serums and cream. In the morning, finish with sunscreen. What to expectSkin feels calm and hydrated after applying. Changes in the look of firmness and texture build gradually with steady use. Good to knowThe colour naturally shifts from deep blue to blue-green or grey with time, light or heat, even before opening; Klairs say this is normal. Store it somewhere cool and out of sunlight, and use it within 6 months of opening. Quick facts: 50 ml dropper · EGF + FGF peptides, guaiazulene · Fragrance-free, alcohol-free · Morning and night · Klairs, made in Korea
Read more
- EGF + FGF peptides, 10 ppm each
- For red, reactive or breakout-prone skin
- First serum, morning and night
- Fragrance-free, alcohol-free
Helps with
RednessSensitivityBreakoutsFine lines
Best for
In stock. Order by 1pm Monday to Friday for same-day dispatch
Earn £1.50 back with this purchase
How it works
Free next-day delivery on this item
Free samples with every order
100% authentic K‑beauty- Hand-picked by our founder
Details
Klairs Blue Youth Activating Drop is a calming, watery serum for skin that gets red, reactive or breakout-prone and is starting to show the first fine lines. It's the renamed, repackaged version of Klairs' Midnight Blue Youth Activating Drop, with the same formula: EGF and FGF peptides at 10 ppm each, blue guaiazulene and blueberry extract, in a short, fragrance-free list of 15 ingredients.
What it does
sh-Oligopeptide-1 (often called EGF) and sh-Polypeptide-1 (FGF) are lab-made peptides that Klairs use for the look of firmer, smoother, more resilient skin. Guaiazulene, the blue compound found in chamomile, helps skin feel calm, blueberry extract adds antioxidant care, and adenosine works on the look of fine lines.
Why we chose it
It's one of the gentlest serums we know: no fragrance, no essential oils and no alcohol, with a watery texture that disappears into skin. That makes it an easy first serum for a reactive routine, and an easy one to add before anything richer.
Best for
- Skin that gets red, reactive or easily upset
- Breakout-prone skin that needs a calm serum
- The first fine lines in sensitive skin
- A first serum right after cleansing or toner
Not ideal if
- You want a rich, cushiony serum: this one is watery and light
Key ingredients
- sh-Oligopeptide-1 (EGF) 10 ppm: the look of firmer, smoother skin
- sh-Polypeptide-1 (FGF) 10 ppm: the look of resilience
- Guaiazulene: helps skin feel calm
- Blueberry extract and adenosine: antioxidant care and the look of fine lines
Texture and finish
A weightless, water-type serum in a 50 ml amber glass dropper bottle. Klairs say it absorbs instantly.
Where it goes in your routine
The first step after cleansing, or after toner, morning and night. Press 3 to 4 drops into skin, then follow with thicker serums and cream. In the morning, finish with sunscreen.
What to expect
Skin feels calm and hydrated after applying. Changes in the look of firmness and texture build gradually with steady use.
Good to know
The colour naturally shifts from deep blue to blue-green or grey with time, light or heat, even before opening; Klairs say this is normal. Store it somewhere cool and out of sunlight, and use it within 6 months of opening.
Quick facts: 50 ml dropper · EGF + FGF peptides, guaiazulene · Fragrance-free, alcohol-free · Morning and night · Klairs, made in Korea
FAQ
How to use
Ingredients
Delivery
UK Delivery
Orders under £25
Shipping: £2.99
Service: Royal Mail Tracked 48
Orders £25 and over
Shipping: FREE
Service: Royal Mail Tracked 24
Dispatch & Delivery Times
- Orders placed before 1pm Monday to Friday are dispatched the same working day.
- Orders placed after 1:00 PM are dispatched the next working day.
- Royal Mail Tracked 48 typically delivers within 2 working days.
- Royal Mail Tracked 24 aims for next working day delivery.
So for orders £25 and over placed before 1pm on a working day:
Order before 1pm → dispatched same day → Royal Mail Tracked 24 aims to deliver the next working day.
Please note that delivery times are estimates and may occasionally vary during busy periods, bank holidays or due to Royal Mail delays.
Blue Youth Activating Drop (50ml)
£29.90
