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Klairs EGF Blue Youth Activating Drop bottle with dropper showing a blue serum drop on a white background
Klairs EGF Blue Youth Activating Drop official EGF repair serum graphic with bottle and blue serum bubbles
Official Klairs graphic explaining why skin needs EGF with blue water texture and molecule artwork
Official Klairs graphic showing how EGF repairs the look of post-blemish marks in three illustrated steps
Official Klairs before-and-after graphic about visible post-blemish marks over four weeks
Klairs EGF Blue Youth Activating Drop key ingredients graphic with blue dropper and ingredient callouts
Klairs EGF serum comparison graphic with bottle, blue bubbles, and texture notes
Klairs EGF Blue Youth Activating Drop how-to-use tips graphic with serum drop and pipette icons
Klairs EGF Blue Youth Activating Drop color variation guide showing blue and gray serum drops
Klairs recommended routine graphic featuring EGF Blue Youth Activating Drop with toner and cream steps
Klairs EGF Blue Youth Activating Drop ingredient list graphic with bottle, box, and INCI text
Klairs EGF Blue Youth Activating Drop bottle with dropper and blue serum on a white background
Klairs EGF Blue Youth Activating Drop bottle and dropper with a blue serum drop on a white background
Klairs EGF Blue Youth Activating Drop bottle beside black product box on a pale blue background
Klairs EGF Blue Youth Activating Drop bottle with dropper showing a blue serum drop on a white background
Klairs EGF Blue Youth Activating Drop official EGF repair serum graphic with bottle and blue serum bubbles
Official Klairs graphic explaining why skin needs EGF with blue water texture and molecule artwork
Official Klairs graphic showing how EGF repairs the look of post-blemish marks in three illustrated steps
Official Klairs before-and-after graphic about visible post-blemish marks over four weeks
Klairs EGF Blue Youth Activating Drop key ingredients graphic with blue dropper and ingredient callouts
Klairs EGF serum comparison graphic with bottle, blue bubbles, and texture notes
Klairs EGF Blue Youth Activating Drop how-to-use tips graphic with serum drop and pipette icons
Klairs EGF Blue Youth Activating Drop color variation guide showing blue and gray serum drops
Klairs recommended routine graphic featuring EGF Blue Youth Activating Drop with toner and cream steps
Klairs EGF Blue Youth Activating Drop ingredient list graphic with bottle, box, and INCI text
Klairs EGF Blue Youth Activating Drop bottle with dropper and blue serum on a white background
Klairs EGF Blue Youth Activating Drop bottle and dropper with a blue serum drop on a white background
Klairs EGF Blue Youth Activating Drop bottle beside black product box on a pale blue background
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EGF Blue Youth Activating Drop | EGF Peptide Serum

EGF Blue Youth Activating Drop | EGF Peptide Serum

$29.99
$29.99 $39.99 25% OFF
Shipping calculated at checkout.

EGF Blue Youth Activating Drop is a lightweight first serum for sensitive-feeling skin routines focused on early firmness care, post-blemish look, and visibly stressed skin. The watery formula features EGF and bFGF peptide care with guaiazulene and adenosine in a fast-absorbing texture that fits after cleansing and before toner or the rest of your routine. It is designed for shoppers who want a thin, non-sticky serum step rather than a rich oil or heavy firming product. The blue tone comes from guaiazulene, and color changes may occur naturally without changing the product quality. Use 3 to 4 drops on clean skin at night or as your first treatment step, then follow with toner and moisturizer. The formula is fragrance-free and suitable for sensitive-skin routines.

Option: 50 mL
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DETAILS

💙 50 mL: Get Free Shipping & a Free Gift (Blue Drop 10 mL + Blue Calming Cream 20 g)
💙 20 mL: Get Free Shipping & a Free Gift (Blue Calming Cream 20 g)

Featured by Song Of Skin (TikTok @songofskin)

1. Highlights
- Korea's #1 EGF Serum: A viral sensation at Olive Young, famous for its high repurchase rate and selling one bottle every 4 seconds.
- 3-Min Instant Calming: Delivers rapid relief for irritated skin, making it the perfect emergency solution for redness & acne.

- Post-Acne Mark Recovery: Targets and fades stubborn blemish marks and pigmentation, restoring a clear and even skin tone.
- Weightless First-Step Serum: A non-sticky, water-based formula that absorbs instantly—ideal for oily and acne-prone skin routines.

2. Value Proposition
- Ultimate Recovery with Maximum Strength: Formulated with 10ppm EGF—the highest concentration allowed by Korean MFDS—and bFGF to powerfully rebuild a resilient skin barrier from within.
- Intense Soothing Power: Infused with 1,000ppm Guaiazulene, this natural herbal powerhouse provides immediate relief and deep calming for sensitized skin.
- Clean & Safe for All: A 100% fragrance-free, non-comedogenic formula that ensures intensive care without clogging pores or irritating even the most sensitive, acne-prone skin.
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At a glance

EGF Blue Youth Activating Drop

Targets Texture, early firmness, post-blemish look
Skin feel Watery, lightweight, fast-absorbing
Routine step First serum, after cleansing
Formula note Fragrance-free, contains lecithin
Proof points

Sensitive-skin peptide care, in clear facts

4.9

Average rating across 451 verified reviews.

Fragrance-Free · Vegan

Formulated for sensitive-skin routines.

EGF + bFGF

Two peptides in a watery first-serum format.

3 cards now fill the full width with no dead space.

Why this serum

A calm, watery first step for stressed skin

Watery texture

Absorbs quickly with no heavy finish, easy to layer.

Peptide care

EGF and bFGF give the formula its firmness-focused angle.

Calming blue tone

Guaiazulene gives the signature blue and a soothing story.

Night-routine friendly

Use as the first step at night, before toner and moisturizer.

Skin fit

Best for / Not for

Best for

  • Sensitive-feeling skin wanting lightweight peptide care.
  • Skin that looks stressed or uneven after blemishes.
  • Night routines that start with a watery first serum.
  • Shoppers who prefer fragrance-free skincare.

Not for

  • Those who want a rich, cushiony serum texture.
  • Anyone looking for a large-volume serum.
  • Soy-sensitive shoppers who avoid lecithin.
Key ingredients

Peptides, calming blue care, firmness support

The ingredient story centers on peptides, blue calming care, and a watery first-serum step for resilient-looking skin.

sh-Oligopeptide-1

EGF

Defines the serum's early anti-aging, peptide-care positioning.

sh-Polypeptide-1

bFGF

A supporting peptide paired with EGF in this lightweight formula.

Calming blue tone

Guaiazulene

Gives the product its blue identity and a calming angle.

Firmness support

Adenosine

A well-known ingredient used for firmness-supporting care.

Build your routine

Prep, treat, and seal

Large line icons keep the routine consistent across products without depending on matching photography.

Step 1 · Prep

Cleanse

Start with a gentle cleanser so the watery serum absorbs into clean skin.

Step 2 · Treat

Apply Blue Drop

Use 3 to 4 drops as your first treatment step, then let it absorb.

Step 3 · Seal

Moisturize

Follow with toner and moisturizer to keep the routine balanced.

  • Watery serum texture
  • First-serum routine step
  • Layering with moisturizer
  • Creator routine examples
@songofskin @songofskin @songofskin
How it works

The mechanism graphics, full size

The full-width mechanism guide explains how Blue Drop fits into a focused peptide and blue calming routine.

Klairs Blue Drop how EGF repairs post-blemish marks graphic
How it works

EGF peptide care for post-blemish skin

The formula is positioned for skin that needs support after blemishes, with peptide care and a watery, fast-absorbing feel.

Results

Before and after, full size

The verified four-week graphic gets its own contain-fit module instead of being cropped inside a small card.

Post-blemish look

Visibly more even after 4 weeks

Supports skin that looks uneven after blemishes, in a lightweight format made for sensitive routines.

Verified claim · consented imagery
Klairs Blue Drop visibly fades post-blemish marks in 4 weeks graphic
FAQ

Questions shoppers ask

What kind of serum is this?

An early anti-aging first serum designed for night use, right after cleansing and before toner.

How do I use it?

Apply 3 to 4 drops to clean skin, let it absorb, then continue with the rest of your routine.

What makes it different from a typical firming serum?

It pairs EGF and bFGF peptides with guaiazulene and adenosine in a lightweight, watery formula made for sensitive skin.

Is it fragrance-free?

Yes, this formula is fragrance-free.

Anything to note before use?

It contains lecithin, so shoppers with soy sensitivities should review the ingredient list first.

Why does the blue color vary?

The blue color comes from guaiazulene, a naturally derived ingredient. Natural color variation may occur, and the product quality is not affected.

Klairs Blue Drop color variation guide
Customer review evidence

What shoppers say about Blue Drop

Selected first-party review excerpts for texture, routine fit, and sensitive-skin signals.

453 published reviews
I used the whole bottle happily! I loved that it was more of an essence texture and I loved the blue color...
Hajra K.
This Midnight Blue Youth Activating Drop has helped my skin so much...
Julie T.
This is a blue tinted serum that is lightweight and has a water like texture...
Christi O.
The Klairs midnight blue youth activating drops are a great part of my skincare...
Becki M.
I have been a huge fan of Dear, Klairs...
Lidia C.
I have very sensitive acne prone skin and this helps to visibly calm everything!
Alex K.
Routine positioning map

Where EGF Blue Youth Activating Drop | EGF Peptide Serum fits in a Klairs routine

Use this map to compare EGF Blue Youth Activating Drop | EGF Peptide Serum by skin concern, routine weight, and next-step pairing.

Top: targeted care Bottom: hydration and comfort Left: daily essentials Right: focused treatment steps
Daily prepCleanse, tone, mist, and simple first layers.
Targeted careSerum, pad, vitamin, and blue-line focused steps.
Hydration baseLightweight daily comfort and flexible layering.
Routine setCream, mask, and complete routine pairings.
Supple Preparation Unscented Toner Unscented Toner Vitamin PDRN Bouncy Pore Serum Vitamin PDRN Midnight Blue Calming Cream Blue Cream EGF Blue Youth Activating Drop | EGF Peptide Serum EGF Blue Youth Activating Drop | EGF Peptide Serum Targeted bounce
Blue calming and resilient-looking care

A focused blue routine step

EGF Blue Youth Activating Drop | EGF Peptide Serum fits into blue calming and resilient-looking care routines alongside daily hydration, targeted care, and complete Klairs routine sets.

  • 1Best for: Skin that looks stressed, sensitized, tired, or ready for a more focused calming routine.
  • 2Routine role: Layer after toner or toner pads when you want a targeted blue step before moisturizer.
  • 3Pair with: Pair with EGF Blue Calming Toner Pad, Blue Calming Mist, or Midnight Blue Calming Cream.
PrepCleanse, tone, or mist depending on your routine start.
TreatLayer the product where its texture and role fit best.
FinishSeal with cream, sunscreen, or a routine set step.
Klairs routine match character holding skincare products
Find your Klairs routine match Explore Klairs picks by hydration, soothing, barrier, glow, texture, and after-sun routine needs. Start the guide