KLAIRS
Midnight Blue Youth Activating Drop 20ml
This toner from KLAIRS is Midnight Blue Youth Activating Drop. It suits normal, combination, dry and oily skin. Comes in a 20ml size.
No reviews yet20 ml
$25.00 per 10 ml
- Korean-market formula
- Ships from California or direct from Korea
- Korean barcode and batch code intact
- Suited to
- NormalCombinationDryOily
- Helps with
- A prepped base for the rest of the routineEveryday hydration
In stock. Arrives in 3 to 7 business days
We accept
You’re $100.00 away from free US shipping.
- 30-day returns
- Free US shipping on orders of $100 or more
- Tracked delivery to your door
Key benefits
- Adenosine on the ingredient list at entry 15 of 15
- sh-Oligopeptide-1 on the ingredient list at entry 3 of 15
- sh-Polypeptide-1 on the ingredient list at entry 4 of 15
- Sized at 20 ml for the way this step is actually used in a routine
- Sourced for the Korean market and sold as the same formula, not a US-shelf reformulation
Key actives
3sh-Oligopeptide-1
sh-Oligopeptide-1 is confirmed on this row's own ingredient list rather than inferred from the product's name or category, which is what makes it a checkable component of the formula rather than a marketing-only mention.
4sh-Polypeptide-1
sh-Polypeptide-1 is confirmed on this row's own ingredient list rather than inferred from the product's name or category, which is what makes it a checkable component of the formula rather than a marketing-only mention.
5Vaccinium Angustifolium (Blueberry) Fruit Extract
Vaccinium Angustifolium (Blueberry) Fruit Extract is confirmed on this row's own ingredient list rather than inferred from the product's name or category, which is what makes it a checkable component of the formula rather than a marketing-only mention.
15Adenosine
Adenosine is a wrinkle-care ingredient recognized in Korean cosmetic regulation. It sits on this formula's own ingredient list, which is what separates a confirmed component from a name printed on the front of the box.
Inside the formula
Inside the formula
- 3sh-Oligopeptide-1
- 4sh-Polypeptide-1
- 5Vaccinium Angustifolium
- 15Adenosine
Where each key active sits on the declared ingredient list, by entry number. Position is proportion: the further forward, the larger its share.
What is Midnight Blue Youth Activating Drop?
It is a toner from KLAIRS (20ml).
How do I use this toner?
Pat or sweep onto clean skin right after cleansing, morning and night, before serum or moisturizer, to prep the skin for what follows.
Do I need a separate essence if I use this?
A toner and an essence can both sit in the same slot; use one or layer both, thinner formula first, based on how much hydration your skin wants that day.
Not on the ingredient list below: fragrance or parfum, denatured or SD alcohol, essential oils, silicones, parabens, sulfate surfactants, mineral oil or petrolatum and added color.
Full INCI (15): Water, Butylene Glycol, sh-Oligopeptide-1, sh-Polypeptide-1, Vaccinium Angustifolium (Blueberry) Fruit Extract, Lecithin, Sorbitan Sesquioleate, 1,2-Hexanediol, Caprylyl Glycol, PEG-60 Hydrogenated Castor Oil, Glycerin, Chlorphenesin, Guaiazulene, Ethylhexylglycerin, Adenosine
Ingredient list read from jolse.com on 10 September 2026.
15 of 15 explained
- Water solvent
- Water is the base almost every serum, toner and cream is built on. It dissolves the water-loving ingredients and sets how light the finished texture feels. On an INCI list it is usually first, which only means it is the largest single ingredient by weight.
- Butylene Glycol humectant
- Butylene Glycol is a small glycol that does two jobs at once: it holds water in the top layer of skin and it dissolves plant extracts and actives that plain water cannot. It also thins a formula, which is why watery Korean essences lean on it.
- sh-Oligopeptide-1 peptide
- sh-Oligopeptide-1 is a peptide made by yeast fermentation rather than synthesis, which is what the sh prefix records. It is used for the look of firmness and skin recovery after irritation.
- sh-Polypeptide-1 peptide
- sh-Polypeptide-1 is a longer fermentation-produced peptide. It is used in formulas built around the look of resilience and recovery.
- Vaccinium Angustifolium (Blueberry) Fruit Extract plant extract
- Lowbush blueberry fruit extract, high in anthocyanins. Berry extracts are used as plant antioxidants and can tint a formula.
- Lecithin emulsifier
- Lecithin is a soy or sunflower-derived phospholipid, the same class of molecule cell membranes are built from. It emulsifies oil into water and is the basis of the liposomes formulators use to carry actives.
- Sorbitan Sesquioleate emulsifier
- Sorbitan Sesquioleate is a water-in-oil emulsifier and pigment disperser. Cleansing oils use it so water can be worked into the oil at the rinse.
- 1,2-Hexanediol humectant
- 1,2-Hexanediol is a glycol used for two reasons: it holds water like glycerin, and it makes a formula harder for microbes to live in, so less traditional preservative is needed. Korean formulas use it heavily for that second reason.
- Caprylyl Glycol preservative booster
- Caprylyl Glycol is a glycol that conditions skin and, more importantly, strengthens a preservative system so less of the traditional preservative is needed. It appears in most modern formulas built without parabens.
- PEG-60 Hydrogenated Castor Oil emulsifier
- PEG-60 Hydrogenated Castor Oil is a castor-oil-derived solubiliser. It is what keeps fragrance and oil-soluble ingredients dissolved in a watery formula so it stays clear.
- Glycerin humectant
- Glycerin is the most used humectant in skincare. It draws water into the outer layer of skin and holds it there, and it is one of the very few ingredients whose hydrating effect is settled science rather than marketing. Higher amounts feel tacky, which is why it is usually blended.
- Chlorphenesin preservative
- A preservative effective against bacteria, yeast and mould across a wide pH range, which is why it appears where a single milder preservative cannot cover the formula.
3 more explained
- Guaiazulene active
- Guaiazulene is the deep blue compound distilled from chamomile and guaiac wood, and it is what colours a blue formula naturally. It is used for the look of reactive, reddened skin.
- Ethylhexylglycerin preservative booster
- Ethylhexylglycerin softens skin and boosts a preservative system, which is why it is nearly always sitting beside phenoxyethanol or 1,2-hexanediol. It also cuts down the odour bacteria produce, so it turns up in deodorising products.
- Adenosine active
- Adenosine is a nucleoside that Korea's own cosmetic authority recognises as a wrinkle-care functional ingredient, which is why it appears on so many Korean lists at a low level. It is used for the look of fine lines and is stable and well tolerated.
- Market
- Korean market, the version sold in Korea
- Made in
- Republic of Korea
- Volume
- 20 ml
- Category
- Serum & Ampoule
- Ships from
- California or Korea
Orders ship from California or direct from Korea with tracked delivery to your door, and both routes carry the same Korean-market release. Shipping is free on orders of $100 or more. Returns are accepted for 30 days, by mail.
We split shipments free, so one out-of-stock item never holds up the rest of your order.
Where this unit came from
- 1Seoul
Bought as Korean-market stock - 2Barcode
Listed against the Korean barcode on its box - 3California or Korea
Ships to you from either, as the same Korean-market release
We stock the version of a formula that is sold in Korea, not the release a brand prepares for another market under the same name.
Every unit keeps its original barcode and batch code intact, so the unit in your hands can be checked against the brand’s own records.
Every order ships from California or direct from Korea, and returns run for 30 days.
Every claim on this page traces to the unit in the box, the barcode, the batch code and the price you can read for yourself.
How it works
Midnight Blue Youth Activating Drop 20ml is KLAIRS's serum, a dropper-format serum, layered after toner and before moisturizer. Its own ingredient list carries Adenosine at entry 15 of 15; sh-Oligopeptide-1 at entry 3 of 15; sh-Polypeptide-1 at entry 4 of 15; Vaccinium Angustifolium (Blueberry) Fruit Extract at entry 5 of 15, which is what the key-actives panel below is built from rather than the product name alone. A serum's thinner, faster-absorbing texture is built to sit under a heavier cream rather than replace one. Placement in the routine matters as much as any single ingredient, so this step is built to layer cleanly with what comes before and after it. Patch-test on the inner arm before a first full-face use, as with any new skincare step, and stop if irritation appears.
How to use
- Pat or sweep onto clean skin right after cleansing, morning and night, before serum or moisturizer, to prep the skin for what follows.
Worth knowing
- Introduce once daily first if new to the formula, then move to twice daily.
Complete the routine
- This itemKLAIRS Midnight Blue Youth Activating Drop 20ml$50.00
- Seal the routine in as the last stepKlairs Rich Moist Soothing Cream 80ml$42.50
- The treatment step of this routineKLAIRS Rich Moist Soothing Serum 80ml$32.50
Total for 3 items$125.00
Reviews
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KLAIRS Midnight Blue Youth Activating Drop 20ml
How it felt, how your skin took it, what you layer it with. Straight answers help the next person choose.
KLAIRS, Korean-market original
Serum, 20 ml, with Adenosine and sh-Oligopeptide-1.
Verify your unit when it arrives
Verify your unit when it arrives
Korean-market stock with the original barcode and batch code intact, exactly as it left Korea.
On the unit itself
- The Korean-market barcode, unaltered from the retail package.
- The manufacturer’s batch code, exactly as the maker printed it.
정품Genuine article, Korean-market stock
What professionals say
What professionals say
What skin-care professionals say about the key actives in this formula, quoted from the medical sources linked beside each.
Peptides can be anti-inflammatory, and chronic inflammation damages the tissue in your skin.
Wilma Bergfeld, MDDermatologist, Cleveland Clinic In skin, different peptides can encourage different things, from collagen formation to a reduction in inflammation to helping with wound healing depending on their structure.
Whitney Hovenic, MDDouble board-certified dermatologist and Mohs surgeon, Women's Health
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