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Kiehl's Powerful-Strength Line-Reducing Concentrate for mature skin

Rated by Lovi · Unbiased, science-based skincare AI trained on real user outcomes

Kiehl's Powerful-Strength Line-Reducing Concentrate

Average

  • SuperiorNormal Skin Fit
  • HighEffectiveness
  • ExcellentSafety

Works for mature skin; other serums fit it better.

This fit is calculated for the concerns frequently associated with mature skin: fine lines, wrinkles, and loss of firmness. 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

  • This product offers moderate benefits for your normal skin, with Ascorbic Acid and Glycerin providing antioxidant activity and humectant action to support your goals of reducing wrinkles and fine lines. Adenosine and Hydrolyzed Hyaluronic Acid further aid in hydration and wrinkle reduction, though stronger concentrations of these actives could enhance efficacy.
  • The formulation is generally safe for your normal skin, as it lacks harsh ingredients and includes soothing components like Ascorbyl Glucoside and Hydrolyzed Hyaluronic Acid, minimizing irritation risk.

How to apply

  • Use this serum in your PM routine. Start by applying it 3 times a week, and work up to daily use if your skin likes it.
  • Apply this serum after your toner and before your moisturizer.
  • Gently press 2-3 drops of the serum into your skin and let it absorb for a minute.
  • You can apply the serum on dry skin for the best results against fine lines.
  • Always do a patch test before your first use and avoid the sensitive eye area.

People Say

★4.4Overall rating based on 3.5k+ reviews

Based 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 mature skin?

This treatment works moderately well for mature skin, providing some antioxidant and hydration benefits to help smooth lines, though other products fit this skin type better. Mature skin needs a treatment that is exceptionally safe and effective at smoothing lines, packed with high concentrations of potent antioxidants, peptides, and hydrating ingredients.

Journal of Cosmetic Dermatology, 2020Clinical, Cosmetic and Investigational Dermatology, 2017

Which ingredients make this serum a good fit for mature skin?

This serum fits mature skin well through ingredients like Ascorbic Acid and Glycerin, which help smooth fine lines and keep the face hydrated. To work best for mature skin, a product of this type needs high concentrations of potent antioxidants, peptides, and humectants for optimal moisture retention and wrinkle reduction.

Journal of Cosmetic Dermatology, 2020Clinical, Cosmetic and Investigational Dermatology, 2017

What does Vitamin C do for mature skin?

Vitamin C helps mature skin by smoothing out wrinkles, brightening dark spots, and boosting firmness. It works by encouraging collagen production to keep skin looking youthful and radiant.

Journal of Cosmetic Dermatology, 2020Journal of Cosmetic Dermatology, 2023

What does Hyaluronic Acid do for mature skin?

Hyaluronic acid helps mature skin by deeply boosting moisture, improving elasticity, and smoothing the appearance of fine lines and wrinkles. Regular use keeps the skin looking plump and soft while supporting overall firmness and hydration.

Journal of Drugs in Dermatology, 2011Skin Research and Technology, 2024

Where does this serum go in a skincare routine for mature skin?

This treatment goes in the evening routine after cleansing and before moisturizing, though some treatments can also be used in the morning. Mature skin requires products with stronger concentrations of active ingredients like vitamin C, peptides, and hyaluronic acid to better reduce wrinkles and improve firmness.

Can I use this serum with retinol, and in what order?

You can use this serum with retinol, but it is best to apply retinol at night and use this vitamin C treatment in the morning to avoid overwhelming your skin. This product works for mature skin, though this skin type benefits most from a product with stronger concentrations of active ingredients for better wrinkle reduction and hydration.

Journal of Cosmetic Dermatology, 2020Clinical, Cosmetic and Investigational Dermatology, 2017

How often should I use this serum?

You can use this serum in the evening as part of your routine for simplicity and extra safety around sun exposure. This type of mature skin needs treatments featuring stronger concentrations of active ingredients like vitamin C and hyaluronic acid to better reduce wrinkles and fine lines.

Journal of Cosmetic Dermatology, 2020Clinical, Cosmetic and Investigational Dermatology, 2017

Can this serum clog pores, cause breakouts or purging for mature skin?

This serum is unlikely to cause breakouts for mature skin, as it has a low risk and lacks harsh ingredients. However, a product of this type needs stronger concentrations of active ingredients and lightweight, non-greasy hydrators to give mature skin the best results.

Is this serum fragrance-free and alcohol-free?

It has no drying alcohol and contains fragrance (limonene and citral).

What the research says

  • A topical serum containing vitamin C, vitamin E, and raspberry leaf cell culture extract improved skin color, elasticity, radiance, smoothness, scaliness, and wrinkles compared to the untreated contralateral side in fifty female volunteers.

    Journal of Cosmetic Dermatology, 2020

  • 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, 2017

  • Adenosine-loaded dissolving microneedle patches showed similar or better efficacy on skin wrinkles, dermal density, elasticity, and hydration compared to adenosine cream in 22 female subjects.

    International Journal of Cosmetic Science, 2018

  • Topical hyaluronic acid filler serum combined with Botulinum toxin type A lengthened the duration of the toxin's effect in reducing wrinkles compared to Botulinum toxin type A alone.

    Dermatologic Therapy, 2022

  • Profhilo 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, 2022

  • Topical 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, 2003

  • Ascorbic acid 2-glucoside gel significantly reduced gingival melanin pigmentation after 4 weeks compared to placebo in 73 subjects with symmetric pigmentation.

    Journal of Periodontology, 2009

  • Topical 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, 2022

  • Topical 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, 2011

  • Topical 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, 2022

  • Treatment 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, 2019

  • The 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, 2020

  • Ten 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, 2001

  • Niacinamide/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, 2012

  • Topical 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, 2008

  • Topical 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, 2026

  • Adenosine 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 mature skin better

  • Caviar oil enhanced adipocyte differentiation in vitro, reduced MMP expression while increasing collagen and elastin formation ex vivo, and improved skin moisture, elasticity, and density in 102 participants over four weeks of Cavi Balm usage compared to baseline.

    In Vivo, 2023

  • Chronomodulated daytime application of baicalin and nighttime application of palmitoyl tripeptide-1 synergistically improved skin luminance by 16.29%, nasolabial fold depth by -36.35%, and firmness by 24.35% in 30 female participants.

    Journal of Cosmetic Dermatology, 2026

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.

  • Nadia Kapleva, MS

    Nadia Kapleva, MS

    Co-founder, Medical Director

    Cosmetic chemist, cosmetologist, aesthetic products developer

  • Alexey Shagraev, PhD

    Alexey Shagraev, PhD

    Co-founder, CEO and CTO

    PhD in computer science, 3x US patent holder, ex-Google, ex-Yandex

  • Dr. Sofía Perea Pérez, MD, MSc

    Dr. Sofía Perea Pérez, MD, MSc

    Medical Board

    Aesthetic medicine practitioner, MSc in Longevity and Anti-Aging Medicine

  • Aishani Shah, MD

    Aishani Shah, MD

    Medical Board

    Specialist dermatologist, MBBS, MD, IFAAD

  • Asya Zubkova, MS

    Asya Zubkova, MS

    Medical Board

    Cosmetic chemist, SCS, IFSCC member

  • Hanna Kurets, MD

    Hanna Kurets, MD

    Medical Board, Medical Advisor

    Dermatology MD

  • Elina Nazarenko, MD

    Elina Nazarenko, MD

    Medical Board

    Dermatology and diagnostic consultant

  • Victoria Derkova, MS

    Victoria Derkova, MS

    Medical Board

    Cosmetic chemist, cosmetic development technologist

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Prices checked 10 Oct – 6 Nov 2026

The Lovi Fit is the same in every country; only the stores and prices differ, and the ones here are for Canada.

How does it fit your skin?

Scan your face, then any product: Lovi shows how well it fits you and what fits even better.

QR code: get the Lovi app
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