ZO Skin Health Firming Serum for combination skin

How to apply

Questions and answers

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, 2017

• Topical application of Low-Peony PDRN enhanced barrier recovery and improved periorbital skin elasticity in human subjects.

  International Journal of Molecular Sciences, 2025

• Retinyl palmitate-loaded non-ionic lamellar liquid crystalline systems provided a significant reduction of orbicular wrinkles in human volunteers compared to systems without retinyl palmitate.

  Colloids and Surfaces. B, Biointerfaces, 2011

• Topical application of 1,3-propanediol at various concentrations, alone or combined with butylene glycol and/or glycerol, increased skin hydration and reduced trans epidermal water loss in 30 healthy female subjects over an 8-hour period, with the 15% concentration and the addition of glycerol providing greater benefits.

  International Journal of Cosmetic Science, 2024

• Dermatological products containing d-alpha tocopheryl acetate showed non-comedogenic potential with less than a 50% increase in microcomedones in 12 healthy male subjects compared to octyl palmitate.

  Contemporary Clinical Trials Communications, 2021

• Over-the-counter retinol products provided only weak evidence for a mild ameliorating effect on fine facial skin wrinkle lines in randomized, double-blind, vehicle-controlled trials, and major methodological flaws call the validity of positive results into question.

  The Journal of Clinical and Aesthetic Dermatology, 2021

• A cosmetic niacinamide/peptide/retinyl propionate regimen significantly improved periorbital wrinkle appearance relative to a 0.02% tretinoin regimen at 8 weeks with comparable benefits at 24 weeks, while demonstrating significantly better tolerability in 196 women.

  The British Journal of Dermatology, 2010

• A novel triple-active cosmetic formulation containing 4-hexylresorcinol, retinyl propionate, and niacinamide improved the visual appearance of photoageing similarly to 0.02% tretinoin and reversed a consensus gene signature associated with ageing in female adults while causing less skin irritation.

  International Journal of Cosmetic Science, 2024

• Polydeoxyribonucleotide promotes skin regeneration by increasing ERK phosphorylation, collagen accumulation, and cell proliferation and migration in fibroblasts while inhibiting ERK phosphorylation and inflammatory cytokine expression in keratinocytes.

  Molecular Medicine Reports, 2023

• A topical mixture of polydeoxyribonucleotide, vitamin C, and niacinamide delivered via a microneedling therapy system decreased skin pigmentation and increased skin elasticity by attenuating melanogenesis and the destruction of collagen and elastin fibers in a UV-B-radiated animal model.

  Molecules, 2022

• Polydeoxyribonucleotide treatment induces mitochondrial biogenesis while reducing melanin biosynthesis, tyrosinase activity, MITF expression, elastase activity, and MMP-1 gene expression in cultured skin cells.

  Applied Biochemistry and Biotechnology, 2020

• Leontopodium alpinum callus culture extract improved anti-periorbital wrinkles, skin elasticity, dermal density, skin thickness, antioxidant activity, and moisturizing activity while suppressing inflammation and wrinkling compared to placebo and in response to UVB treatment.

  Genes, 2020

• Leontopodium alpinum callus culture extract at 10-15 mg/mL promoted COL-I production and inhibited MMP-1, OPN3, ROS, and calcium influx in a blue-light-induced human foreskin fibroblast damage model, indicating an anti-blue-light-damage effect through the OPN3-calcium pathway.

  Molecules, 2023

• A concentrated ethanol extract of Edelweiss callus culture (ECC55) protected primary human keratinocytes and endotheliocytes against various inflammatory and oxidative stimuli by inhibiting chemokine release, restoring sirtuin-inhibited cellular markers, and suppressing inflammation-related gene expression.

  Mediators of Inflammation, 2012

• Topical application of an antioxidant serum containing 15% ascorbic acid, 0.5% ferulic acid, and 1% tocopherol prevented particulate matter-induced degradation of extracellular matrix components, inflammation, and oxidative stress in the skin of 15 female volunteers compared to untreated controls.

  Journal of Cosmetic Dermatology, 2025

• Topical application of an antioxidant mix containing 15% ascorbic acid, 0.5% ferulic acid, and 1% tocopherol prevented PM and UV-induced skin barrier perturbation, lipid peroxidation, inflammatory markers, MMP9 activation, and Type I collagen loss in 15 healthy females compared to untreated exposed skin.

  Journal of Cosmetic Dermatology, 2024

• A topical antioxidant serum significantly reduced air pollution-induced skin pigmentation and proinflammatory gene expression ex vivo, and improved skin aging signs in 40 healthy adult females after 90 days of daily use.

  Journal of Cosmetic Dermatology, 2022

Ingredients

Water, Glycerin, Propanediol, Dipropylene Glycol, Sodium Dna, Leontopodium Alpinum Meristem Cell Culture, Marrubium Vulgare Meristem Cell Culture, Melilotus Officinalis Extract, Tocopheryl Acetate, Retinyl Palmitate, Caprooyl Tetrapeptide-3, Lecithin, Dextran, Hydroxypropyl Methylcellulose, Carbomer, Aminomethyl Propanol, Cellulose, Polysorbate 20, Caprylyl Glycol, Lactose, Ethylhexylglycerin, Hexylene Glycol, Disodium Edta, Citric Acid, Phenoxyethanol, Parfum, Ultramarines, Ext, Violet 2, Limonene

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.