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Shop Pyunkang Yul Acne Toner BHA Astringent for Face Natural Ingredients Sebum Control (5.07 Fl Oz)
Toner
Pyunkang Yul

Acne Toner BHA Astringent for Face Natural Ingredients Sebum Control (5.07 Fl Oz)

~$16· 5.07 Fl Oz
RednessDark spotsAcneVisible pores

What it's good for

Key actives from our research database. Click any to read the full evidence dossier.

  • NiacinamideStrong evidenceFull dossier ↗

    A multitasker that calms redness, evens out skin tone, and helps oily skin balance out. One of the safest do-a-little-of-everything ingredients.

    Good for: Brightening, Barrier repair, Anti-inflammatory

  • Centella AsiaticaModerate evidenceFull dossier ↗

    Also called "cica," it calms redness, repairs the skin barrier, and speeds up recovery. The go-to for irritated or reactive skin.

    Good for: Anti-inflammatory, Barrier repair

  • EGCG (Green Tea)Strong evidenceFull dossier ↗

    A polyphenol from green tea that calms UV-triggered redness and reinforces your sunscreen as a second line of antioxidant defense.

    Good for: Antioxidant, Anti-inflammatory, Sun protection

  • Licorice RootModerate evidenceFull dossier ↗

    A gentle Asian-skincare brightener derived from licorice root. Fades dark spots and calms redness, and it's a pregnancy-safe alternative to stronger fade ingredients.

    Good for: Brightening, Anti-inflammatory

  • ChamomileModerate evidenceFull dossier ↗

    The classic "tea-bag-on-puffy-eyes" botanical. Calms angry skin via well-studied anti-inflammatory pathways, gently. Good for reactive or rosacea-prone complexions.

    Good for: Anti-inflammatory, Antioxidant

  • Copper PeptidesModerate evidenceFull dossier ↗

    A signal peptide that tells your skin to make more collagen and elastin. Quiet but consistent firmness support over months of daily use.

    Good for: Anti-aging

  • GlycerinModerate evidenceFull dossier ↗

    A workhorse hydrator that pulls water into your skin. In nearly every good moisturizer for a reason.

    Good for: Hydrating

Evidence behind the ingredients

Real citations from our research database, one per tracked active in this product. Click any ingredient name to read its full evidence dossier.

NiacinamideStrong evidence10 citations

A multitasker that calms redness, evens out skin tone, and helps oily skin balance out. One of the safest do-a-little-of-everything ingredients.

Moro F et al., Skin Cancer Prevention and Antiaging: Role of Nicotinamide, International Journal of Molecular Sciences 2026

2026Mechanism onlyPMID:42278444View source ↗

Passeron T et al., An Investigator-Blinded, Randomized Trial of a Broad-Spectrum Sunscreen Containing Sclareolide and Niacinamide, Dermatology and Therapy (Heidelberg) 2026

2026Positive (efficacy)PMID:41240206View source ↗

Vergilio MM et al., Topical Formulation with Niacinamide Combined with 5 MHz Ultrasound for Improving Skin Ageing, Current Medicinal Chemistry 2025

2025Positive (efficacy)PMID:39171587View source ↗
Centella AsiaticaModerate evidence6 citations

Also called "cica," it calms redness, repairs the skin barrier, and speeds up recovery. The go-to for irritated or reactive skin.

Hur N et al., A Randomized, Double-Blind, Placebo-Controlled Trial Assessing the Effects of Oral Centella asiatica Extract on Skin Aging-Related Parameters in Middle-Aged Korean Women, Nutrients 2026

2026Positive (efficacy)PMID:42196964View source ↗

Borowicz KK et al., Geroprotective Potential of Centella asiatica: Modulation of Cellular Aging, Nutrients 2026

2026Mechanism onlyPMID:42280293View source ↗

Witkowska K et al., Topical Application of Centella asiatica in Wound Healing: Recent Insights into Mechanisms and Clinical Efficacy, Pharmaceutics 2024;16(10):1252 — modern hydrogel and nanostructured Centella delivery systems accelerate wound healing across wound types

2024Meta-analysis (positive)PMID:39458583View source ↗
EGCG (Green Tea)Strong evidence7 citations

A polyphenol from green tea that calms UV-triggered redness and reinforces your sunscreen as a second line of antioxidant defense.

Detudom P, Kamanamool N, Paichitrojjana A, Udompataikul P, Udompataikul M, Efficacy of anti-sebum moisturizing cream containing 2% l-carnitine and 5% epigallocatechin gallate in seborrhea, Journal of Cosmetic Dermatology 2023;22(11):3058-3064 — Thai RCT showed EGCG-containing cream significantly reduced sebum and improved hydration in seborrhea

2023Positive (efficacy)PMID:37194909View source ↗

Ud-Din S et al., A Double-Blind, Randomized Trial Shows the Role of Zonal Priming and Direct Topical Application of Epigallocatechin-3-Gallate in the Modulation of Cutaneous Scarring in Human Skin, Journal of Investigative Dermatology 2019;139(8):1680-1690 — topical EGCG reduced scar thickness weeks 1-3 and increased elasticity at week 4 vs placebo

2019Positive (efficacy)PMID:30822414View source ↗

Kim YR et al., Clinical Evaluation of a New-Formula Shampoo for Scalp Seborrheic Dermatitis Containing Rosa centifolia + EGCG: A Randomized Double-Blind Controlled Study, Annals of Dermatology 2014;26(6):733-8 — EGCG-containing shampoo matched ketoconazole and zinc pyrithione efficacy; faster erythema response than 1% zinc pyrithione

2014Positive (efficacy)PMID:25473226View source ↗
+4 more ingredients
Licorice RootModerate evidence9 citations

A gentle Asian-skincare brightener derived from licorice root. Fades dark spots and calms redness, and it's a pregnancy-safe alternative to stronger fade ingredients.

Glabridin Inhibits Melanogenesis and Melanin Transfer via Wnt/beta-Catenin Pathway and Rho Family GTPase-Mediated Dendritic Formation Suppression, Pharmaceuticals (Basel) 2026;19(3) — glabridin (the licorice-root active) suppressed melanin synthesis and keratinocyte melanin transfer in vitro via Wnt/beta-Catenin and Rho-GTPase dendrite suppression

2026Mechanism onlyPMID:41901315View source ↗

Liu Y et al., Glycyrrhiza glabra extract as a skin-whitening agent: Identification of active components and CRTC1/MITF pathway-inhibition mechanism, Journal of Ethnopharmacology 2025;349:119948 — identifies glabridin as the principal active and maps skin-whitening mechanism via CREB/CRTC1/MITF suppression

2025Mechanism onlyPMID:40350048View source ↗

Wang JY et al., Preparation of compound liquorice microemulsion gel and its pharmacodynamics evaluation, Zhongguo Zhong Yao Za Zhi (China Journal of Chinese Materia Medica) 2020;45(21):5193-5199 — compound licorice (Glycyrrhiza) microemulsion gel significantly reduced ear swelling and inflammatory infiltration in chronic eczema mouse model

2020Positive (efficacy)PMID:33350235View source ↗
ChamomileModerate evidence6 citations

The classic "tea-bag-on-puffy-eyes" botanical. Calms angry skin via well-studied anti-inflammatory pathways, gently. Good for reactive or rosacea-prone complexions.

Essential Oil of Matricaria chamomilla Alleviates Psoriatic-Like Skin Inflammation by Inhibiting PI3K/Akt/mTOR and p38MAPK Signaling Pathway, Clinical Cosmetic and Investigational Dermatology 2024

2024Mechanism onlyPMID:38222858View source ↗

Comparative analysis of whole plant, flower and root extracts of Chamomilla recutita L. (Germany), Frontiers in Immunology 2024

2024Mechanism onlyPMID:38720895View source ↗

Xu J et al., Therapeutic effects of chamomile volatile oil nanoemulsion/Bletilla striata polysaccharides gels on atopic dermatitis, International Journal of Biological Macromolecules 2024 — topical chamomile volatile oil nanoemulsion (19.07 nm) reduced skin damage, epidermal thickness, and mast cell infiltration in atopic dermatitis mice; rebalanced Th1/Th2

2024Positive (efficacy)PMID:39111460View source ↗
Copper PeptidesModerate evidence7 citations

A signal peptide that tells your skin to make more collagen and elastin. Quiet but consistent firmness support over months of daily use.

Patel MN et al., An Assessment of the Safety, Efficacy, and Tolerability of a Novel Scalp Treatment Regimen Combining a Hydroxy Acid-Based Scrub and Copper Tripeptide Serum in the Management of Seborrheic Dermatitis in Adults, Cureus 2024;16(9):e70108 — 15-day interventional study: copper tripeptide regimen reduced flaking, improved hydration in seborrheic dermatitis

2024Positive (efficacy)PMID:39449909View source ↗

Jiang F et al., Synergy of GHK-Cu and hyaluronic acid on collagen IV upregulation via fibroblast and ex-vivo skin tests, Journal of Cosmetic Dermatology 2023;22(9):2598-2604 — in vitro + ex vivo: GHK-Cu + HA promoted collagen I, IV, and VII; 25.4-fold collagen IV increase in fibroblasts

2023Mechanism onlyPMID:37062921View source ↗

Dou Y et al., The potential of GHK as an anti-aging peptide, Aging Pathobiology and Therapeutics 2020;2(1):58-61 — narrative review of GHK-Cu's anti-inflammatory and tissue-remodeling mechanisms

2020Mechanism onlyPMID:35083444View source ↗
GlycerinModerate evidence6 citations

A workhorse hydrator that pulls water into your skin. In nearly every good moisturizer for a reason.

Danby SG et al., Different types of emollient cream exhibit diverse physiological effects on the skin barrier in adults with atopic dermatitis, Clinical and Experimental Dermatology 2022;47(6):1154-1164 — glycerol+urea emollient delivered superior barrier-strengthening and irritant protection

2022Positive (efficacy)PMID:35167133View source ↗

Youssef R et al., Glycerol 85% efficacy on atopic skin and its microbiome: a randomized controlled trial, Journal of Dermatological Treatment 2021;32(7):730-736 — topical glycerol 85% RCT on atopic skin

2021Positive (efficacy)PMID:31869257View source ↗

Evans NJ et al., Human axillary skin condition is improved following incorporation of glycerol into the stratum corneum from an antiperspirant formulation, Archives of Dermatological Research 2017;309(9):739-748 — 4% glycerol penetrated axillary SC, reduced irritation, improved hydration

2017Positive (efficacy)PMID:28889318View source ↗

Sources: 10 clinical journals and regulatory databases across the US, EU, Korea, Japan, and China. Every entry points to a specific document. See methodology for the full list and what each outcome label means.

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