Kiehl's Powerful-Strength Line-Reducing Concentrate for sensitive skin
Ascorbic Acid
Sodium Hyaluronate
Glycerin
AdenosineAverage
- HighNormal Skin Fit
- AverageEffectiveness
- ExcellentSafety
Works for sensitive skin; other serums fit it better.
This fit is calculated for the concerns frequently associated with sensitive skin: redness, stinging, and reactions to new products. For scores and recommendations based on your full skin profile, including your 12D face scan results and any goals or preferences you have, please use the Lovi app.
Page built Nov 8, 2026How the Fit score works
Lovi Assistant explains
- Offers moderate benefits for your normal skin, as Ascorbic Acid and Glycerin provide antioxidant and hydrating effects, though they do not specifically target your primary concerns of redness and irritation.
- The inclusion of Hydrolyzed Hyaluronic Acid offers additional hydration, which is beneficial for overall skin health.
- The product is safe for your sensitive skin, containing soothing ingredients and lacking harsh components.
How to apply
- Use your serum in the PM routine, starting 3 times a week before building up to daily use if your skin is happy.
- Apply the serum after cleansing and toning, but before putting on your moisturizer for the best results.
- Gently press 2-3 drops of the serum into your skin and wait a minute ⏱ for it to soak in.
- Since your skin is sensitive and easily irritated, apply the serum on completely dry skin to help keep it calm.
- Always do a patch test before your first use and avoid getting the serum too close to your eyes .
People Say
★4.4Overall rating based on 3.5k+ reviewsBased on a very large amount of data, users frequently praise this serum for its high concentration of Vitamin C and Hyaluronic Acid, noting that it visibly brightens dull complexions and smooths skin texture almost immediately. While many appreciate the unique warming sensation and velvety finish, results on deep wrinkles vary, and the silicone-heavy formula can be polarizing for those with oily or acne-prone skin.
Highlights
Smoother skin Mostly Mentioned
- “leaves skin feeling silky”
- “instant blurring effect”
- “velvety finish”
- “softens rough patches”
Visible brightening Often Mentioned
- “faded acne scars”
- “woke up glowing”
- “skin looks more radiant”
- “evened out skin tone”
Warming sensation Often Mentioned
- “feels like it's working”
- “soothing heat”
- “nice warming feeling”
- “spa-like sensation”
Fine line reduction Sometimes Noted
- “plumped my smile lines”
- “softened forehead wrinkles”
- “helped with crows feet”
- “lines look less deep”
Greasy residue Sometimes Noted
- “didn't absorb well”
- “felt like a greasy film”
- “too oily for day use”
- “shiny layer left behind”
Pills under makeup Sometimes Noted
- “rolled off my face”
- “pills under sunscreen”
- “can't wear under makeup”
- “balls up if rubbed”
Causes breakouts Rarely Noted
- “caused tiny whiteheads”
- “terrible cystic breakout”
- “clogged my pores”
- “gave me blackheads”
Unpleasant scent Rarely Noted
- “smells like hot dog water”
- “metallic scent”
- “weird citrus odor”
- “strong chemical smell”
Sources: lovi.care, bloomingdales.com, spacenk.com, sephora.sg, kiehls.com, ulta.com, and more
Questions and answers
How well does Kiehl's Powerful-Strength Line-Reducing Concentrate work for sensitive skin?
This treatment works for your sensitive skin, though other products fit it better. It offers moderate hydration and antioxidant effects, but it does not specifically target redness and irritation. Treatments that fit sensitive skin better need ingredients that target redness and irritation while posing no risk of irritation.
Which ingredients make this serum a good fit for sensitive skin?
Ascorbic acid and glycerin help provide antioxidant and hydrating effects that work well for your sensitive skin, while sodium hyaluronate and hydrolyzed hyaluronic acid offer extra moisture for overall skin health. A product of this type needs ingredients that soothe redness and irritation without harsh components to be a truly great fit for this skin.
What does Vitamin C do for sensitive skin?
Vitamin C helps brighten skin, smooth out fine lines, and fade dark spots. Clinical studies show it is generally safe and well-tolerated when improving overall skin quality.
Journal of Cosmetic Dermatology, 2020Journal of Cosmetic Dermatology, 2023
What does Hyaluronic Acid do for sensitive skin?
Hyaluronic acid helps calm and hydrate sensitive skin while supporting the skin barrier to keep it soft and comfortable. Clinical studies show it improves surface moisture and reduces dryness, roughness, and redness without irritation.
Journal of Drugs in Dermatology, 2025Journal of Cosmetic Dermatology, 2018
Where does it go in a skincare routine for sensitive skin?
This treatment goes in your evening routine, after cleansing and toning and before moisturizing. A product of this type for sensitive skin needs calming and hydrating ingredients like centella asiatica, green tea, or ceramides to soothe redness and irritation.
Can I use this serum with retinol, and in what order?
How often should I use it?
This treatment works well in the evening for your sensitive skin, though other products fit it better. To care for redness and irritation, this skin type needs gentle, hydrating ingredients and calming botanical extracts.
Can it clog pores, cause breakouts or purging for sensitive skin?
It is unlikely to cause breakouts for sensitive skin, as complaints about breakouts are low. A product for this skin type needs soothing ingredients and calming plant extracts that reduce redness and irritation while keeping it soft.
Is this serum fragrance-free and alcohol-free?
It has no drying alcohol and contains fragrance (limonene and citral).
What the research says
A single application of a moisturizing fluid containing hyaluronic acid 1%, glycerin 5%, and Centella asiatica stem cells extract significantly increased skin hydration by 29% and reduced transepidermal water loss at 24 hours compared to baseline and an untreated control site in twenty healthy women.
Clinical, Cosmetic and Investigational Dermatology, 2017Profhilo gel combined with Dysport Botox significantly improved skin hydration, skin thickness, and GAIS scores compared to Dysport Botox injection alone in 19 participants seeking neck rejuvenation.
Dermatologic Therapy, 2022Profhilo treatment led to significant improvements in superficial skin hydration and transepidermal water loss over time in Chinese females, while demonstrating good product tolerability.
Aesthetic Plastic Surgery, 2026Topical application of 5% vitamin C cream significantly improved global clinical scores, increased skin microrelief density, and induced elastic tissue repair in photoaged skin compared to excipient control in healthy female volunteers.
Experimental Dermatology, 2003Ascorbic acid 2-glucoside gel significantly reduced gingival melanin pigmentation after 4 weeks compared to placebo in 73 subjects with symmetric pigmentation.
Journal of Periodontology, 2009Topical application of VC-IP cream twice daily for 8 weeks reduces periorbital wrinkles in female subjects compared to a placebo cream.
Journal of Cosmetic Dermatology, 2022Topical application of 0.1% hyaluronic acid formulations of different molecular weights led to significant improvements in skin hydration and elasticity, with low-molecular-weight formulations also significantly reducing wrinkle depth in seventy-six female subjects compared to a vehicle control.
Journal of Drugs in Dermatology, 2011Topical application of hyaluronic acid in conjunction with free gingival graft significantly reduced donor site postoperative pain until day 7 compared to normal saline, with no significant differences in graft dimensions or patient satisfaction.
Clinical Oral Investigations, 2022Treatment with a hyaluronic acid-containing mouth rinse or topical gel led to significant lesion reduction, pain relief, and normalization of lesion color in adult patients with minor recurrent aphthous stomatitis, with the gel formulation showing an earlier healing onset at 3 days.
BMC Oral Health, 2019The emollient V0034CR significantly reduced TEWL compared to vehicle and vehicle plus glycerol, and significantly increased corneometry scores compared to vehicle and vehicle plus petrolatum in healthy volunteers with dry skin, demonstrating combined barrier function improvement from petrolatum and hydration improvement from glycerol.
Journal of Cosmetic Dermatology, 2020Ten days of treatment with a cream containing 20% glycerin significantly increased skin hydration measured by corneometer values in 17 healthy volunteers compared to a placebo cream, but showed no influence on transepidermal water loss or skin sensitivity to an irritating surfactant.
International Journal of Cosmetic Science, 2001Niacinamide/glycerin body moisturizers provided better rapid and prolonged improvement of cosmetic xerosis through functional improvement of stratum corneum barrier function compared to no treatment and conventional moisturizers in female subjects.
Journal of Drugs in Dermatology, 2012Topical adenosine treatment significantly increased the anagen hair growth rate and thick hair rate compared to placebo in Japanese women with female pattern hair loss over 12 months.
The Journal of Dermatology, 2008Topical application of a disodium adenosine monophosphate-based formulation reduced wrinkles and hyperpigmentation while improving hydration, barrier function, skin lifting, and epidermal turnover in female participants.
International Journal of Molecular Sciences, 2026Adenosine and cordycepin stimulate the Wnt/beta-catenin signaling pathway through adenosine receptor and PKA activation, promoting cell proliferation, migration, and growth factor secretion in cultured dermal fibroblasts.
International Journal of Molecular Sciences, 2021
Why other serums fit sensitive skin better
Topical application of TAT-SOD significantly suppresses UVB-induced erythema formation, blood flow rise, and apoptotic sunburn cell formation in human volunteers compared to a vehicle control.
European Journal of Pharmaceutics and Biopharmaceutics, 2016
Ingredients
Propylene Glycol, Dimethicone, Glycerin, Ascorbic Acid, Ethylhexyl Palmitate, Cetyl Peg Ppg-10 1 Dimethicone, Dimethicone Crosspolymer, Ascorbyl Glucoside, Cyclohexasiloxane, Hydroxyethylpiperazine Ethane Sulfonic Acid, Lauroyl Lysine, Acrylonitrile Methyl Methacrylate Vinylidene Chloride Copolymer, Polysilicone-11, Adenosine, Hydrolyzed Hyaluronic Acid, Limonene, Isobutane, Citrus Aurantium Dulcis Peel Oil, Citrus Limon Lemon Peel Oil, Citral, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate
Behind this fit score
Lovi calculates every fit score from the full ingredient list with brand-independent rules our dermatologists and cosmetic chemists build and review, and personalizes every pick with AI trained on the real results of millions of users. Lovi trains its fit score models on a proprietary dataset built from more than 10,000 expert-labeled products and more than 100,000 simulated examples, following an internally consistent methodology presented at Cosmoprof, AMWC, and Skin of Color Update.
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Co-founder, Medical Director
Cosmetic chemist, cosmetologist, aesthetic products developer
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Co-founder, CEO and CTO
PhD in computer science, 3x US patent holder, ex-Google, ex-Yandex
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Dr. Sofía Perea Pérez, MD, MSc
Medical Board
Aesthetic medicine practitioner, MSc in Longevity and Anti-Aging Medicine
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Medical Board
Specialist dermatologist, MBBS, MD, IFAAD
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Medical Board
Cosmetic chemist, SCS, IFSCC member
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Medical Board, Medical Advisor
Dermatology MD
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Elina Nazarenko, MD
Medical Board
Dermatology and diagnostic consultant
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Victoria Derkova, MS
Medical Board
Cosmetic chemist, cosmetic development technologist
How does it fit your skin?
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