K-SECRET SEOUL 1988 Serum for oily 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 bakuchiol 0.5% applied twice daily compared with retinol 0.5% applied daily significantly decreased wrinkle surface area and hyperpigmentation with no statistical difference between the compounds in 44 patients over 12 weeks, while retinol users reported more facial skin scaling and stinging.

  The British Journal of Dermatology, 2019

• Topical application of a serum containing supramolecular Bakuchiol and Terminalia chebula extract significantly improved barrier function, reduced redness and sensitivity, and improved wrinkles and elasticity in 34 Chinese subjects with sensitive skin after 28 days.

  Health Science Reports, 2025

• Twice daily application of retinaldehyde 0.1% and 0.05% creams for 3 months improved skin texture and hydration and reduced transepidermal water loss in 40 female Korean volunteers, with only the 0.1% cream significantly improving the melanin index.

  Journal of Cosmetic Dermatology, 2018

• Topical retinaldehyde demonstrated significant antibacterial activity against gram-positive bacteria both in vitro and in vivo, leading to decreased bacterial counts without inducing resistance.

  Dermatology, 2002

• Topical 0.05% retinaldehyde applied over 1 year significantly increased epidermal thickness of the temple and cutaneous elasticity compared to an emollient control group in 40 aging skin patients.

  Dermatology, 1999

• Enzyme-modified ginseng extract cream significantly reduced the global photo-damage score and various roughness measures including total roughness, smoothness depth, and arithmetic roughness average compared to placebo in 23 human subjects.

  Rejuvenation Research, 2015

• A red ginseng hydrogel formulation with 1,2-hexanediol promoted selective growth of Staphylococcus epidermidis and decreased Cutibacterium acnes in 20 female subjects.

  Journal of Ginseng Research, 2022

• A 1% fermented black ginseng cream significantly reduced eye wrinkles and brightened skin color in twenty-three human subjects compared to control cream and baseline.

  Journal of Toxicology and Environmental Health. Part A, 2020

• Topical post-laser application of human adipocyte-derived mesenchymal stem cell media combined with niacinamide significantly improved wrinkle index, melanin index, patient satisfaction, and investigator esthetic improvement scores compared to vehicle cream in patients with aging skin.

  Journal of Cosmetic Dermatology, 2021

• Topical nicotinamide prevented solar-simulated UV-induced immunosuppression in healthy volunteers, and men experienced immunosuppression at solar-simulated UV doses three times lower than those required for women.

  The Journal of Investigative Dermatology, 2008

• Topical 5% niacinamide applied twice daily for 12 weeks reduced fine lines and wrinkles, hyperpigmented spots, red blotchiness, and skin sallowness, and improved skin elasticity compared to vehicle control in 50 female white subjects with facial photoaging.

  Dermatologic Surgery, 2005

• A dermocosmetic containing bakuchiol, Ginkgo biloba extract, and mannitol improves inflammatory lesions, Investigator Global Assessment, and seborrhea intensity when added to adapalene 0.1% gel in patients with acne vulgaris.

  Clinical, Cosmetic and Investigational Dermatology, 2015

• Bakuchiol functions as an anti-aging compound through retinol-like regulation of gene expression, producing significant improvements in lines, wrinkles, pigmentation, elasticity, firmness, and photo-damage after 12 weeks of twice-a-day facial application without usual retinol therapy-associated undesirable effects.

  International Journal of Cosmetic Science, 2014

• A nature-based bakuchiol-containing cleanser and moisturizer improved visual and tactile smoothness, clarity, radiance, overall appearance, global anti-aging, and skin moisture content by 16% in 60 female subjects with sensitive mild to moderate photodamaged skin over 4 weeks.

  Journal of Drugs in Dermatology, 2020

• 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

Why other serums fit oily skin better

• A panthenol-enriched mask improved skin hydration, regulated sebum, and reduced redness and TEWL across dry sensitive, oily sensitive, and oily acne skin subgroups with excellent tolerance and no adverse reactions.

  Journal of Cosmetic Dermatology, 2024

• Niacinamide and ferulic acid incorporated in a stable multiple emulsion successfully reduced melanin, sebum, and skin erythema while improving skin elasticity and hydration in human skin compared to a placebo.

  BioMed Research International, 2022

Ingredients

Panax Ginseng Root Extract, Water, Glycerin, Dipropylene Glycol, Caprylic Capric Triglyceride, 1,2-Hexanediol, Niacinamide, Butylene Glycol, Methyl Gluceth-20, Polyglycerin-3 Methylglucose Distearate, Hydrogenated Lecithin, Sorbitan Stearate, Ammonium Acryloyldimethyltaurate Vp Copolymer, Macadamia Ternifolia Seed Oil, Carbomer, Tromethamine, Betaine, Tocopherol, Ethylhexylglycerin, Helianthus Annuus Seed Oil Sunflower Seed Oil, Adenosine, Disodium Edta, Cholesterol, Polyglyceryl-10 Oleate, Brassica Campestris Sterols, Phytosteryl Behenyl Octyldodecyl Lauroyl Glutamate, Retinal, Silica, Aluminum Magnesium Hydroxide Stearate, Potassium Cetyl Phosphate, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate, Arctium Lappa Root Extract, Cnidium Officinale Root Extract, Dioscorea Japonica Root Extract, Paeonia Suffruticosa Root Extract, Rehmannia Chinensis Root Extract, 3-O-Ethyl Ascorbic Acid, Bakuchiol, Sh-Oligopeptide-1, Sh-Oligopeptide-2, Sh-Polypeptide-1

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.