Dear, Klairs review: K-beauty analyzed by a doctor

Midnight Blue Calming Cream, Supple Preparation, Vitamin C

Article written by Dr Sylvain David - Plastic and aesthetic surgeon - Updated: March 2026

Information : This content is for informational and educational purposes only. It does not constitute a medical consultation. BeautyDecoded application allows you to choose cosmetics adapted to your skin type thanks to artificial intelligence.

Dear, Klairs - «Simple but sufficient»: K-beauty founded for sensitive skin (Seoul, 2010)

Dear, Klairs is a Korean cosmetics brand founded in 2010 in Seoul by the Wishcompany. Its name is conceived as «a love letter to a girl struggling with her skin».» - a founding philosophy that sums it all up: products are not developed based on industry trends, but on customer feedback. The brand has reformulated and adjusted its products by listening to users, even modifying its packaging in response to feedback.

His slogan «Simple but Sufficient - Basic but Ultimate - Gentle but Powerful».» defines a precise formulatory philosophy: fewer, better-chosen ingredients at effective concentrations. All Dear, Klairs formulas systematically exclude: artificial colorants, alcohol, parabens, artificial fragrances. All products are vegan, cruelty-free, made in Korea. The brand is constantly working to reduce the environmental impact of its packaging. Supple Preparation Toner sold over one million bottles in over 40 countries.

Dear, Klairs ranges - structure and positioning

The Dear, Klairs sensitive skin signal - why the scores are almost all positive

Dear, Klairs is one of the very few marques K-beauty companies whose products listed in BeautyDecoded almost all feature positive or zero sensitive skin scores (+0.25 to +1.25) - with the notable exception of Vitamin C (-7.75, due to the acidity of ascorbic acid) and Tonic with fragrance (-9.75). This result is a direct consequence of the brand's formulatory charter: systematic absence of alcohol, artificial fragrances, colorants and parabens. This tolerance profile is documented in the reviews: no BeautyDecoded review reports any irritation or allergic reaction to the Midnight Blue, Supple Preparation, Rich Moist and Fundamental ranges.

«Dear, Klairs is the K-beauty brand that most faithfully respects its positioning in the BeautyDecoded data. The «Simple but Sufficient» promise is directly reflected in the scores: 8 out of 12 products have positive or zero sensitive skin scores - an exceptional result in the BD database. But the real reviews reveal two clinically interesting paradoxes. First paradox: Midnight Blue Youth Activating Drop has an algorithmic anti-aging score of 76.5, but 4 reviews converge on «no visible results.» This is the limit of pure formulatory evaluation - an active ingredient can be correct without generating a result that can be perceived by the user. Second paradox: Vitamin C (anti-aging score 83.3, spots 76.5) only scores 4/5 because daily use irritates, but intermittent use «is incredible» according to two reviews. This is a signal of usage protocol, not of formulatory quality. The product for which I retain the most clinically valuable signal: Fundamental Water Gel Cream (redness 76.5, anti-aging 79.05, 1 documented rosacea review).»

The 12 Dear, Klairs products - BeautyDecoded overview

Note on BeautyDecoded reviews: the ratings and review excerpts displayed on this page come from users of the BeautyDecoded application. These reviews are not verified. Publication dates and review details are available on each product sheet.

BeautyDecoded structural signal: The Dear, Klairs catalog is divided into two clear groups. The «basic fragrance-free» formulated products (Tonique Sans Parfum, Rich Moist, Fundamental Water Gel) have sensitive skin scores +0.5 to +1.25 and 5/5 ratings. Active anti-aging products (Vitamine C, Midnight Blue Sérum) have high algorithmic scores but more mixed user ratings (3.6 to 4/5) - perceived effectiveness doesn't always follow the formulatory architecture. This signal is invaluable in guiding purchases.

Dear, Klairs review - product by product analysis (BeautyDecoded data)

Midnight Blue Calming Cream - The brand's signature soothing cream

5.00/5  - 9 reviews BeautyDecoded | Price: ~€22-28

Main assets : Guaiazulene (natural blue anti-inflammatory dye) + Centella Asiatica + Peptides + soothing active ingredients

BeautyDecoded algorithmic scores

Verdict Sensitivity (Dr David rule) : Suitable for sensitive skin  (score : 0.35)

Expert deciphering

The flagship soothing cream in the Midnight Blue range. Dry skin score: 91 and normal to dry skin score: 91 - excellent. Oily skin score: 14 - unsuitable (rich formula). Sensitive skin score: +0.35 - well adapted. Redness score: 37.4 - consistent with soothing positioning. Rated 5/5 out of 9 reviews - Dear, Klairs' best-rated and most documented product in BeautyDecoded.

Guaiazulene is a terpene derivative obtained by distillation of Roman chamomile oil - it gives the cream its characteristic blue color. It has a documented anti-inflammatory and soothing action on irritated and stressed skin. Centella asiatica provides healing and barrier repair action. Peptides complete the anti-aging profile. In Korea, the Midnight Blue range has become so iconic that the brand has adopted blue as the main color of its visual identity.

The 9 BeautyDecoded reviews are exceptionally clinically rich. Documented rosacea signal: «effective on my rosacea, it calms redness very well» - with a valuable seasonal nuance: «for winter, it's not nourishing enough». After-sun signal documented in the tropics: «used as an after-sun for 3 weeks in the tropics - no irritation.» An honest opinion without excessive enthusiasm: «this cream is soft and comfortable but that's all, it just moisturizes» - measured result signal. Make-up compatible: «I can wear make-up afterwards without any problem.»

My analysis

«Midnight Blue Calming Cream is Dear, Klairs« top product in BeautyDecoded - 9 reviews, 5/5, dry skin 91, sensitive skin +0.35. Documented rosacea signal with seasonal nuance (summer: perfect / winter: insufficient). Validated after-sun use in the tropics. Oily skin 14: unsuitable. An honest review documents the result as »basic but comfortable« - reflecting the brand's »Simple but Sufficient» philosophy."

Verdict: Top product - 9 reviews, 5/5. Dry skin 91. Sensitive skin +0.35. Rosacea documented. After-sun validated. Make-up compatible. Oily skin 14: unsuitable. «Just moisturizes» according to honest opinion.

BeautyDecoded user reviews (9 reviews in total)

5.0/5  «Very soothing - effective on my rosacea, calms redness very well. Fresh and pleasant texture, very good for summer for dry skin. For winter, it's not nourishing enough.»

5.0/5  «Perfect - used as after-sun for 3 weeks in the tropics! No irritation (sun 50+ several times a day of course).»

5.0/5  «Magical - this cream soothes the skin, calms redness, moisturizes and penetrates well. The texture is so pleasant and makes the skin soft.»

5.0/5  «Comfortable and soft - this cream is soft and comfortable but that's it, it has no particular effect on the skin. It just moisturizes. I only bought it once.»

5.0/5  «Very good - the texture is perfect, I can apply make-up afterwards without any problem. Effective moisturizer.»

Note on BeautyDecoded reviews: the ratings and review excerpts displayed on this page come from users of the BeautyDecoded application. These reviews are not verified. Publication dates and review details are available on each product sheet.

Supple Preparation Toner Fragrance-free 180 ml - The Reference Toner for Sensitive Skin

5.00/5  - 4 reviews BeautyDecoded | Price : ~22-28 € (in French)

Main assets : Phyto-Oligo (patented Alcea extract + Aloe Vera) + AH + Beta-Glucane + fragrance-free / essential oil-free

BeautyDecoded algorithmic scores

Verdict Sensitivity (Dr David rule) : Suitable for sensitive skin  (score : 1.25)

Expert deciphering

Fragrance-free version of Supple Preparation Facial Toner - the brand's worldwide bestseller. Oily skin score: 91 and normal to oily skin score: 91 - excellent. Dry skin score: 77 - good. Sensitive skin score: +1.25 - among the highest sensitive skin scores in the BeautyDecoded database. Anti-aging score: 62.9 - high for a toner. Redness score: 55.25. Rated 5/5 out of 4 reviews.

This toner is the improved version of the best-selling Supple Preparation Facial Toner - reformulated without fragrance or essential oils for the most sensitive profiles. The patented Phyto-Oligo ingredient (a blend of alcea extracts and aloe vera leaves) is the formulatory signature of the Rich Moist Soothing / Supple Preparation range by Dear, Klairs. Sensitive skin score +1.25: one of the few K-beauty toners with a high positive score - consistent with the absence of fragrance, alcohol and essential oils. Anti-aging score 62.9: high for a toner - consistent with HA and beta-glucan.

The 4 BeautyDecoded reviews document an expected use and a specific application protocol. Documented application technique signal: «pat on the face to penetrate well and repeat the operation as long as the skin drinks the product» - K-beauty «7 skin method» technique applied spontaneously. Maximum tolerance signal: «very gentle and suitable for sensitive skin as it is fragrance-free - perfect before other serums.»

My analysis

«Supple Preparation Toner Fragrance-free is the benchmark toner for sensitive skin in BeautyDecoded - sensitive skin +1.25 (exceptional for a toner), oily skin 91, anti-aging 62.9, rated 5/5 out of 4 reviews. The «7 skin method» application technique is spontaneously documented. This is the formulatively superior version for hyper-reactive skin vs. the version with fragrance (sensitive skin -9.75).»

Verdict: The benchmark toner for sensitive skin. 4 opinions 5/5. Sensitive skin +1.25. Oily skin 91. Anti-aging 62.9. Redness 55.25. «Fragrance-free sensitive skin» - documented 7-skin method.

BeautyDecoded user reviews (4 reviews in total)

5.0/5  «Gentle, humectant lotion - this lotion is very gentle and suitable for sensitive skin as it is fragrance-free. It is perfect before other serums and skincare products.»

5.0/5  «Moisturizing - excellent moisturizing toner. Use after double cleansing, pat onto face to penetrate and repeat as long as skin drinks up the product.»

5.0/5  «Gentle - very gentle for my sensitive skin.»

Note on BeautyDecoded reviews: the ratings and review excerpts displayed on this page come from users of the BeautyDecoded application. These reviews are not verified. Publication dates and review details are available on each product sheet.

Fundamental Water Gel Cream - Universal Rosacea and Reactive Skin Cream

5.00/5  - 1 opinion BeautyDecoded | Price : ~25-32 €

Main assets : Aqueous gel + film-forming active ingredients + soothing extracts + multi-layer humectants

BeautyDecoded algorithmic scores

Verdict Sensitivity (Dr David rule) : Suitable for sensitive skin  (score : 0.75)

Expert deciphering

Universal gel-cream from the Fundamental range. Exceptional score: dry skin 88.2 and oily skin 91 - almost universal formula. Score for normal to dry skin: 88.2 and for normal to oily skin: 91. Sensitive skin score: +0.75. Redness score: 76.5 - the best redness score in the Dear, Klairs catalog in BeautyDecoded. Anti-aging score: 79.05 - very high. Score 5/5 on 1 review.

Redness score 76.5 is the highest in the entire Dear, Klairs catalog in BeautyDecoded - consistent with an aqueous gel-cream formula without irritating ingredients and with film-forming active ingredients that reinforce the skin barrier. Anti-aging score 79.05 - exceptionally high for a universal moisturizing cream. The gel-cream texture is typically K-beauty: light on application, non-occlusive, rapidly absorbed, compatible with all skin types including oily.

The only BeautyDecoded review (5/5) is clinically precise and touching: «Rosacea sufferer - this cream is a nugget. No reaction and very moisturizing.» Documented rosacea signal - same problem as Midnight Blue Calming Cream, but on a universal gel-cream formula suitable for oily skin. This signal confirms the consistency of the redness score 76.5. 1 insufficient review.

My analysis

«Fundamental Water Gel Cream is the most remarkable discovery in the Dear, Klairs catalog in BeautyDecoded - redness 76.5 (best catalog), anti-aging 79.05, almost universal (88-91 on all profiles), sensitive skin +0.75. Rating 5/5 on 1 review with documented rosacea signal: «suffering from rosacea - this cream is a nugget. No reaction whatsoever.» 1 review insufficient.»

Verdict: Best redness catalog (76.5). Anti-aging 79.05. Universal 88-91. Sensitive skin +0.75. «Rosacea sufferer - nugget, no reaction.» Rating 5/5. 1 insufficient review.

BeautyDecoded user reviews (1 review in total)

5.0/5  «A marvel - suffering from rosacea, this cream is a nugget. No reaction and very moisturizing.»

Note on BeautyDecoded reviews: the ratings and review excerpts displayed on this page come from users of the BeautyDecoded application. These reviews are not verified. Publication dates and review details are available on each product sheet.

Préparation Souple Lotion All-over 250 ml - The Best Texture in the Catalogue

5.00/5  - 4 reviews BeautyDecoded | Price: ~30-40 € € for BeautyDecoded

Main assets : Emollient body lotion + humectants + long-lasting nourishing active ingredients

BeautyDecoded algorithmic scores

Verdict Sensitivity (Dr David rule) : Suitable for sensitive skin  (score : 0.5)

Expert deciphering

All-over body lotion from the Supple Preparation range. Dry skin score: 84 and normal to dry skin score: 91 - excellent. Oily skin score: 21 - unsuitable (rich lotion). Sensitive skin score: +0.5 - well suited. Anti-aging score: 76.5 - high for a body lotion. Spots score : 57.8 - noticeable. Score 5/5 out of 4 reviews.

Large-format body lotion (250 ml) from the Supple Preparation range. Anti-ageing score 76.5 and blemish score 57.8: high for a body lotion - consistent with multi-layer humectant active ingredients. Sensitive skin +0.5: well adapted, consistent with the brand's «no artificial fragrances / no alcohol / no colorants» charter.

The 4 BeautyDecoded reviews document exceptional enthusiasm for texture - an unusual and precise signal. Superior texture signal: «if I had to make a top list of creams with the best textures, this one would probably take first place.» Behavioral loyalty signal: a user «cut the tube at the end so as not to lose any» - documented physical loyalty behavior, rare in the BeautyDecoded database. Q/P signal: «excellent value for money» for 250 ml.

My analysis

«Preparation Souple Lotion All-over is the body lotion with the best texture signal of the entire Dear, Klairs catalog in BeautyDecoded - «probably the top spot for best textures.» Anti-aging 76.5, dry skin 84, sensitive skin +0.5, rated 5/5 out of 4 reviews. Rare behavioral signal: tube cut off at the end to avoid losing any product. Oily skin 21: not very suitable.»

Verdict: «First place for best textures». Anti-ageing 76.5. Dry skin 84. Sensitive skin +0.5. Tube cut off at the end (behavioral loyalty). Q/P 250 ml. Oily skin 21: not suitable.

BeautyDecoded user reviews (4 reviews in total)

5.0/5  «My favorite texture - if I had to make a top of creams with the best textures, this one would probably take first place! I love the way it feels and looks on my skin. I'd have to buy it again.»

5.0/5  «Top hydration - one of the most moisturizing creams on the market. Its texture is very pleasant, hydrates the skin and penetrates very easily.»

5.0/5  «Hydration - moisturizing cream ++ with a very pleasant texture. I also appreciate its large capacity (250 ml). I even cut it off at the end so as not to waste any! Excellent value for money.»

Note on BeautyDecoded reviews: the ratings and review excerpts displayed on this page come from users of the BeautyDecoded application. These reviews are not verified. Publication dates and review details are available on each product sheet.

Vitamin C Freshly Juiced Vitamin Drop - Radiance at the Price of Tolerance

4.00/5  - 3 reviews BeautyDecoded | Price: ~€20-28

Main assets : Vitamin C 5% (ascorbic acid) + active antioxidants + hypoallergenic formula

BeautyDecoded algorithmic scores

Verdict Sensitivity (Dr David rule) : Not suitable for sensitive skin  (score: -7.75)

Expert deciphering

Vitamin C serum 5% (ascorbic acid). Oily skin score: 84 and normal to oily skin score: 91 - excellent. Dry skin score: 74.9 - good. Sensitive skin score: -7.75 - unsuitable. Anti-aging score: 83.3 - among the best anti-aging scores in the entire Dear, Klairs catalog. Blemish score: 76.5 - very high. Rated 4/5 out of 3 reviews.

Ascorbic acid at 5% is one of the most well-documented forms of vitamin C - unstable but highly effective, it inhibits melanogenesis through tyrosinase inhibition and stimulates collagen synthesis. Anti-ageing score 83.3 and spots 76.5: among the highest in the Dear, Klairs catalog - consistent with the vitamin C mechanism. Sensitive skin score -7.75: ascorbic acid is acidic by nature (pH 2.5-3), a source of potential irritation on hyper-reactive profiles - consistent with reviews.

The 3 BeautyDecoded reviews document a clinically interesting paradox: intermittent use is optimal, while daily use generates irritation. Intermittent use signal documented: «I gave it 4 stars because if I use it too long in a row, my skin gets irritated, but if I use it once in a while, my complexion looks incredible. Second review confirms the same pattern: »it made my skin beautiful at first, but if I used it too often it irritated my skin.« Result-based loyalty signal: »I bought my 2nd bottle - it didn't oxidize quickly.«

My analysis

«Vitamin C Freshly Juiced Vitamin Drop has the highest anti-aging (83.3) and spot (76.5) scores in the Dear, Klairs catalog in BeautyDecoded. But all 3 opinions converge on optimal use: intermittent (2-3 times a week), not daily. Sensitive skin -7.75: not very suitable. One review validates stability («did not oxidize quickly»). Recommended protocol: use in cures of 4-6 weeks with breaks».»

Verdict: Best anti-aging (83.3) and spots (76.5) in the catalog. 3 reviews 4/5. Optimal use: intermittent. «Incredible complexion» with moderate use. «Irritated skin» with daily use. Sensitive skin -7.75. 2nd bottle purchased.

BeautyDecoded user reviews (3 reviews in total)

4.0/5  «Incredible effect - I put 4 stars because if I use it too long in a row the skin gets irritated, but if I use it once in a while it gives me an incredible complexion!»

4.0/5  «Good serum - I only put 4 stars because it's mixed. It made my skin look great at first but if I used it too often it irritated my skin.»

4.0/5  «Amazing - this product gave me lovely skin as soon as I started using it. It didn't oxidize quickly. I liked it so much I bought my 2nd bottle.»

Note on BeautyDecoded reviews: the ratings and review excerpts displayed on this page come from users of the BeautyDecoded application. These reviews are not verified. Publication dates and review details are available on each product sheet.

Rich Moist Soothing Serum 80 ml - Le Sérum Réparateur Honnêteté Clinique

5.00/5  - 2 reviews BeautyDecoded | Price : ~22-30 €

Main assets : Phyto-Oligo (patented Alcea + Aloe) + Betaine + Multi-molecular AH + Centella Asiatica

BeautyDecoded algorithmic scores

Verdict Sensitivity (Dr David rule) : Suitable for sensitive skin  (score : 1.25)

Expert deciphering

Soothing moisturizing serum from the Rich Moist Soothing range. Oily skin score: 84 and normal to oily skin score: 91 - excellent. Dry skin score: 71.4 - good. Sensitive skin score: +1.25 - among the highest scores in the BeautyDecoded database. Spots score: 76.5 - high. Redness score : 59.5. Rated 5/5 on 2 reviews.

The patented Phyto-Oligo ingredient (a blend of Klairs alcea and aloe vera extracts) is the formulatory signature of the range. Sensitive skin score +1.25: identical to Tonique Sans Parfum - consistent formula throughout the range. Blemish score 76.5: high for a moisturizing serum - probably linked to complexion regularization through barrier reinforcement. Texture «fairly thick» documented, but «requires only a small amount.»

The 2 BeautyDecoded reviews are short but remarkably clinically honest. Lucid review signal: «this serum is perfect for moisturizing reactive skin, but it won't repair the damage of time because the active ingredient isn't strong enough; it's just a moisturizer and that's good enough.» Documented expectation calibration signal - one user who understands the difference between a moisturizing serum and an active anti-aging serum. 2 insufficient reviews.

My analysis

«Rich Moist Soothing Serum is a benchmark soothing moisturizer in BeautyDecoded - sensitive skin +1.25, anti-aging 71.4, spots 76.5, rating 5/5 out of 2 reviews. Unique clinical honesty signal: «not strong enough for the damage of time - it's just a moisturizer and that's good enough.» This calibration of expectations is the best formulatory description of the Rich Moist range. 2 insufficient reviews.»

Verdict: Benchmark moisturizing serum. Sensitive skin +1.25. Spots 76.5. Redness 59.5. «Just a moisturizer and that's good enough» - documented clinical honesty. Rating 5/5 on 2 reviews. 2 insufficient reviews.

BeautyDecoded user reviews (2 reviews in total)

5.0/5  «Perfect for moisturizing - I used it when my skin was more reactive. This serum is perfect for that but it won't repair the damage of time because the active ingredient isn't strong enough, it's just a moisturizer and that's good enough.»

5.0/5  «Nice - moisturizing serum, with a fairly thick texture that only requires a small amount to plump the skin well.»

Note on BeautyDecoded reviews: the ratings and review excerpts displayed on this page come from users of the BeautyDecoded application. These reviews are not verified. Publication dates and review details are available on each product sheet.

Serum Midnight Blue Youth Activating Drop - The Serum Without the «Wow» Effect»

3.63/5  - 4 reviews BeautyDecoded | Price : ~28-38 € € for the moment

Main assets : Guaiazulene + Centella Asiatica + Niacinamide + concentrated soothing active ingredients

BeautyDecoded algorithmic scores

Verdict Sensitivity (Dr David rule) : Suitable for sensitive skin  (score : 0)

Expert deciphering

Anti-aging serum from the Midnight Blue range. Oily skin score: 84 and normal to oily skin score: 91 - excellent. Dry skin score: 77 - good. Sensitive skin score: 0 - well adapted. Anti-aging score: 76.5 - high. Score 3,625/5 out of 4 reviews - the lowest score in the Dear, Klairs catalog in BeautyDecoded.

The guaiazulene in the serum is identical to that in Midnight Blue cream - a soothing, anti-inflammatory active ingredient. Anti-ageing score 76.5: high and consistent with formulation architecture. Sensitive skin score 0: well adapted. In Korea, this serum has become so iconic that the brand uses it as the signature product in all its campaigns. However, the dissonance between the strong marketing image and the results perceived by users has been documented.

The 4 BeautyDecoded reviews at 3.6/5 document a notable marketing/results dissonance. The main paradox: anti-aging score 76.5 (high) but 4 reviews converge on the absence of visible effect. Signal of progressive disappointment: «I've been using these little blue drops for a long time, but I've never seen a result. Signal of questioning indispensability: »I keep it in my fridge for a cold effect, but is it indispensable? I don't think so.« A more positive opinion documents a slight firming effect after 1 month: »my skin is soothed, a little firmer after 1 month.« The »too liquid« signal recurs in the reviews.

My analysis

«Serum Midnight Blue Youth Activating Drop presents the most documented paradox in the Dear, Klairs catalog in BeautyDecoded: algorithmic anti-aging score 76.5 (high) but user rating 3.625/5 (lowest in the catalog) - 4 reviews converge on the lack of visible effect. «No visible results», «not essential». One review qualifies with a slight firming effect at 1 month. Sensitive skin 0. Texture too liquid reported.»

Verdict: Paradoxe anti-âge (76.5 but 3.6/5 - 4 reviews). «No visible results. »Not essential. Slight firmness at 1 month (1 review). Too liquid reported. Sensitive skin 0. Oily skin 91.

BeautyDecoded user reviews (4 reviews in total)

3.6/5  «I don't know what to think - I've been using these little blue drops for a long time but I've never seen a result, no wow effect or «ah yes anyway», nothing for the skin.»

3.6/5  «Good product - I like this product, it's good. I keep it in my fridge for a cold effect. But is it essential? I don't think so. I find it does nothing for me in the long run.»

3.6/5  «Not convincing - I didn't notice any change or improvement. It's a bit expensive for such a small quantity.»

3.6/5  «Gentle - soothing and quite moisturizing. My skin is soothed, a little firmer after 1 month of use. No allergic reaction. I use it under Midnight Blue cream. Small flaw: it's very liquid.»

Note on BeautyDecoded reviews: the ratings and review excerpts displayed on this page come from users of the BeautyDecoded application. These reviews are not verified. Publication dates and review details are available on each product sheet.

Fundamental Watery Oil Drop - Glowy Serum for Combination Skin

4.50/5  - 3 reviews BeautyDecoded | Price: ~€22-30

Main assets : Biphasic oil-in-water + film-forming active ingredients + moisturizing plant extracts

BeautyDecoded algorithmic scores

Verdict Sensitivity (Dr David rule) : Suitable for sensitive skin  (score : 0.25)

Expert deciphering

Watery oil« biphasic serum from the Fundamental range. Oily skin score: 84 and normal to oily skin score: 91 - excellent. Dry skin score: 79.8 - good. Sensitive skin score: +0.25 - well adapted. Blemishes score: 51 - notable. Redness score : 61.2 - high. Score 4.5/5 out of 3 reviews.

The «watery oil drop» format is a biphasic K-beauty format: a light aqueous phase combined with light oily active ingredients, giving a «glowy» finish with no greasy effect. Imperfections score 51 and redness 61.2: high for a moisturizing serum - consistent with barrier-reinforcing, film-forming active ingredients. Sensitive skin +0.25: well adapted.

The 3 BeautyDecoded reviews document a calibrated enthusiasm - with a signal of expectations disappointed by the marketing image. Signal of honesty in the face of marketing: «given the comments on the internet, I expected a wow effect - but no.» Clear positive signal on combination skin: «I feel it moisturizes well, I have combination skin. Easy to apply makeup behind, doesn't fluff.» Indispensable use signal according to one review: «it's an absolutely indispensable product - moisturizing texture with a glowy effect.»

My analysis

«Fundamental Watery Oil Drop is a solid glowy serum for oily to combination skin - blemishes 51, redness 61.2, sensitive skin +0.25, rated 4.5/5 out of 3 reviews. Expectation calibration signal: «the internet says wow - reality says well without more.» Positive feedback on combination skin and make-up compatibility. 3 insufficient reviews.»

Verdict: Glowy serum for combination skin. 3 reviews 4.5/5. Blemishes 51. Redness 61.2. Sensitive skin +0.25. «Internet says wow - reality: good without more. Make-up compatible. Lint-free.

BeautyDecoded user reviews (3 reviews in total)

4.5/5  «Good hydration - nice moisturizing serum, but on the hydration side there are more effective. Given the comments on the internet I was expecting a wow effect - but no.»

4.5/5  «Very good - good serum, I feel it moisturizes well, I have combination skin. Easy to apply makeup behind, doesn't fluff.»

4.5/5  «Indispensable - this is an absolute must-have product. Lovely texture, moisturizing and leaves the skin with a glowy effect. This range is just perfect.»

Note on BeautyDecoded reviews: the ratings and review excerpts displayed on this page come from users of the BeautyDecoded application. These reviews are not verified. Publication dates and review details are available on each product sheet.

Fundamental Eye Awakening Gel - Le Contour des Yeux Mitigé

3.33/5  - 3 reviews BeautyDecoded | Price: ~€22-28

Main assets : Caffeine + Red Bean Extract + periorbital decongestants

BeautyDecoded algorithmic scores

Verdict Sensitivity (Dr David rule) : Suitable for sensitive skin  (score : 0)

Expert deciphering

Fundamental eye contour gel. Oily skin score: 84 and normal to oily skin score: 91 - excellent. Dry skin score: 81.9 - very good. Sensitive skin score: 0 - well adapted. Anti-ageing score: 67.15 - high for an eye contour gel. Rating 3,333/5 out of 3 reviews - second lowest rating in the Dear, Klairs catalog on BeautyDecoded.

Caffeine is a vasoconstrictor with documented effects on puffiness and periorbital microcirculation. Red bean extract contains tannins and flavonoids with firming and anti-edema properties. Anti-ageing score 67.15: high for an eye contour gel. But the dissonance between algorithmic scores and user reviews is documented - identical signal to Midnight Blue Youth Activating Drop.

The 3 BeautyDecoded reviews at 3.3/5 converge on a slight formulatory disappointment. Insufficient results signal: «I didn't find this product to be very useful - it's pleasant to apply, cold - otherwise nothing special.» Signal of insufficient hydration for dehydrated skin: «nothing exceptional - the only product in this range I don't like. It's not moisturizing enough for dehydrated skin.» A qualified review documents the effect on puffiness: «it moisturizes and quenches intensely, good efficacy on puffiness.» 3 insufficient reviews.

My analysis

«Fundamental Eye Awakening Gel presents a score/opinion dissonance: anti-aging algorithm 67.15 and universal score (81-91) but user rating 3.3/5. Reviews converge on «pleasant but without noticeable effect». One review qualifies: «good efficacy on puffiness». Sensitive skin 0. Insufficient moisturizing signal for dehydrated skin. 3 insufficient reviews.»

Verdict: Dissonance score/opinion. Anti-ageing 67.15 but 3.3/5 (3 reviews). «Pleasant but nothing special». «Effective on puffiness» (1 review). Sensitive skin 0. Dry skin 81.9. Insufficient for dehydrated skin.

BeautyDecoded user reviews (3 reviews in total)

3.3/5  «Boff - I haven't found this product to be of much use! It's nice to apply, cold... otherwise nothing special.»

3.3/5  «Bof - nothing exceptional, the only product in this range that I don't like. It's not moisturizing enough for dehydrated skin.»

3.3/5  «Good product - I like this product, it moisturizes and quenches intensely. Works well on puffiness.»

Note on BeautyDecoded reviews: the ratings and review excerpts displayed on this page come from users of the BeautyDecoded application. These reviews are not verified. Publication dates and review details are available on each product sheet.

The two Dear, Klairs paradoxes - formulatory score vs. perceived result

BeautyDecoded reveals a unique structural signal in the Dear, Klairs catalog: two products feature anotable dissonance between their algorithmic score (high) and their user rating (below 4/5). This signal is clinically important - it documents the limit of purely formulatory assessment and introduces the notion of «perceived result» vs. «formulating potential».

This phenomenon is documented in the cosmetology literature: a well-formulated active ingredient does not necessarily produce the desired result. sufficiently noticeable within a short timeframe to generate user satisfaction. Midnight Blue Youth Activating Drop scores well because guaiazulene and centella are documented anti-inflammatory actives - but their action is gradual and subtle, not very visible in the short term. Midnight Blue cream (same range, same active ingredients, richer format) scores 5/5 out of 9 reviews - the difference is the texture and immediate sensation, not the active ingredients. This signal is invaluable in guiding your choice within the range.

Dear, Klairs vs K-beauty alternatives - positioning in minimalist clean beauty

Dear, Klairs sets itself apart from its minimalist K-beauty competitors with its strong emotional positioning - a brand born of a «love letter» to a girl with difficult skin, with a a 3-storey boutique in Seoul and a tea ceremony with a waiting list of several weeks. Vs CeraVe: same fragrance-free / irritant-free positioning, but K-beauty vs. American dermo-pharma - textures are clearly more K-beauty at Klairs. Vs Avène: same target for sensitive skin, French thermal range vs. minimalist Korean K-beauty. The most differentiating BeautyDecoded signal: sensitive skin scores are systematically higher at Dear, Klairs vs. the K-beauty average - confirming the brand's formulatory consistency.

Frequently asked questions - Dear, Klairs

Dear, is Klairs a good brand for sensitive skin?

Yes - Dear, Klairs is one of the marques K-beauty products best positioned for sensitive skin in BeautyDecoded. 8 out of 12 products have positive or zero sensitive skin scores, which is exceptional. The formulatory charter (no artificial fragrances, no alcohol, no colorants, no parabens) is systematically respected. Supple Preparation Perfume-Free Toner (sensitive skin +1.25) and Rich Moist Soothing Serum (sensitive skin +1.25) are the two references best suited to hyper-reactive profiles. The only exception is Vitamin C (sensitive skin -7.75) - intermittent use recommended for this profile.

What's the difference between Klairs Fragrance Free Toner and Klairs Fragrance Toner?

The difference is clinically significant in BeautyDecoded. Supple Preparation Toner Fragrance-free (sensitive skin score +1.25) is reformulated without fragrance or essential oils - a superior version for sensitive and hyper-reactive skin. Supple Preparation Toner with original fragrance (sensitive skin score -9.75) is unsuitable for sensitive skin, due to its fragrance components. For any sensitive or reactive profile: the fragrance-free version is formulatively superior and features the same moisturizing active ingredients (Phyto-Oligo, AH, beta-glucan). The user rating confirms this difference: 5/5 for the fragrance-free version vs. 3.5/5 for the original version.

Is Midnight Blue Calming Cream effective on rosacea?

This is the best-documented signal in the Dear, Klairs catalog in BeautyDecoded. Of the 9 reviews for Midnight Blue Calming Cream, two explicitly document an effect on rosacea and redness - «effective on my rosacea, it calms redness very well» and «suffering from rosacea - this cream is a nugget.» Fundamental Water Gel Cream (redness 76.5) also documents a positive rosacea opinion. Guaiazulene is a documented anti-inflammatory active ingredient. Important: one review notes that for winter, Midnight Blue cream is «not nourishing enough» on dry skin - for dry profiles in winter, consider a richer cream on top.

How to use Klairs Freshly Juiced Vitamin C Drop to avoid irritation?

The 3 BeautyDecoded reviews converge on the answer: intermittent use optimal, daily use contraindicated. The recommended protocol: 2-3 applications per week in 4-6 week cures, not daily. One review documented «an incredible complexion» with this protocol, but skin irritation with prolonged daily use. Ascorbic acid (pure vitamin C) is acidic by nature (pH 2.5-3.5) - a source of irritation with frequent application to profiles with a weakened barrier. Do not combine with exfoliants (AHA/BHA) on the same night. Always apply SPF 50+ the next morning.

Is Serum Midnight Blue Youth Activating Drop worth the price?

This is the most talked-about product in the Dear, Klairs catalog on BeautyDecoded. Anti-aging algorithm score 76.5 (high) but user rating 3.625/5 out of 4 reviews, 3 of which document «no visible results» and «not essential.» One review qualifies with «slight firmness at 1 month.» The dissonance is documented: guaiazulene and centella are effective soothing active ingredients, but their action is gradual and hardly noticeable in the short term. If the objective is visible anti-aging results, BeautyDecoded data point to Vitamin C Freshly Juiced (anti-aging 83.3) or Fundamental Water Gel Cream (anti-aging 79.05). If the objective is daily soothing, Midnight Blue cream (5/5, 9 reviews) is the most documented choice.

What is the BeautyDecoded application?

BeautyDecoded uses artificial intelligence to help you choose the right cosmetics for your skin type. The application analyzes INCI formulations and generates compatibility scores for 80 skin types. 12 Dear, Klairs products are referenced with 36 reviews. The most clinically valuable signal: the Klairs range's systematically positive sensitive skin scores confirm the consistency of their «fragrance-free / alcohol-free / colorant-free» charter - data impossible to produce without BeautyDecoded's INCI analysis. It does not constitute a medical consultation.

BeautyDecoded - The science of skin. Without marketing.

Information for educational purposes only. This information does not replace a medical consultation. Dr Sylvain David, Plastic Surgeon, Researcher and Youtuber.