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Shop Holika Holika Watermelon Mask Sheet
Treatment
Holika Holika

Watermelon Mask Sheet

At a glance
Routine step
Treatment
When
Morning and evening
Pairs well with
Retinol, Glycolic Acid, Lactic Acid, Mandelic Acid
How to use

Apply a thin layer to the areas you are treating, after serums and before moisturizer. Follow the label on frequency.

Ingredient research in this formula

These are ingredient-level research links, not evidence that this exact product has been clinically tested.

  • AllantoinFair evidenceFull dossier

    A gentle smoother and skin-soother. Reduces flakiness and helps the surface look more even.

    Good for: Anti-inflammatory, Hydrating

  • GlycerinGood 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.

AllantoinFair evidence6 citations

A gentle smoother and skin-soother. Reduces flakiness and helps the surface look more even.

Xu Z et al., Efficacy and Safety of Topical Compound Heparin Sodium Allantoin Gel for the Treatment of Rosacea, Journal of Cosmetic Dermatology 2025;24(4):e70129: RCT (n=82, 12 weeks): allantoin gel improved erythema and alleviated itching/burning vs traditional therapy

2025Positive (efficacy)PMID:40177799View source ↗

Tan C et al., The combination of allantoin, bisabolol, D-panthenol and dipotassium glycyrrhizinate mitigates UVB-induced PGE2 synthesis by keratinocytes, International Journal of Cosmetic Science 2024;46(5):691-701: in vitro: allantoin combination reduced UVB-induced PGE2, IL-1α, IL-6, IL-8, TNFα

2024Mechanism onlyPMID:38433250View source ↗

Saucedo-Acuna RA et al. (Mexico), Characterization and In Vivo Assay of Allantoin-Enriched Pectin Hydrogel for the Treatment of Skin Wounds, International Journal of Molecular Sciences 2023;24(8):7377: allantoin-pectin hydrogel reduced wound healing time by about 71% with complete closure at day 15 in rat model

2023Mechanism onlyPMID:37108540View source ↗
GlycerinGood 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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