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Shop Tatcha Indigo Overnight Repair Treatment
Treatment
Tatcha

Indigo Overnight Repair Treatment

~$94· 50mlPM only
RednessDrynessFine lines & firmness

What it's good for

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

  • Colloidal OatmealStrong evidenceFull dossier ↗

    An FDA-recognised skin protectant that helps soothe the feeling of itch, redness, and dryness on irritated skin. FDA recognised it as a Category I skin protectant in 2003, and 1% creams showed improvement over their base formula for dry, irritation-prone skin in controlled trials.

    Good for: Barrier repair, Anti-inflammatory, Hydrating

  • SqualaneAnecdotal evidenceFull dossier ↗

    A lightweight oil that mimics what your skin already makes. Softens and seals in hydration without feeling greasy.

    Good for: Barrier repair, 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.

Colloidal OatmealStrong evidence5 citations

An FDA-recognised skin protectant that helps soothe the feeling of itch, redness, and dryness on irritated skin. FDA recognised it as a Category I skin protectant in 2003, and 1% creams showed improvement over their base formula for dry, irritation-prone skin in controlled trials.

Lisante TA, Nuñez C, Berube D, Leyden J. A 1% colloidal oatmeal OTC cream is clinically effective for the management of mild to moderate atopic dermatitis in Black or African American children. J Dermatolog Treat. 2023;34(1):2241587. — randomized controlled trial; OTC 1% oatmeal cream at least as effective and safe as prescription barrier cream in this population.

2023Positive (efficacy)PMID:37592879View source ↗

Jones VA, Patel PM, Wilson C, Wang H, Ashack KA. Complementary and alternative medicine treatments for common skin diseases: A systematic review and meta-analysis. JAAD Int. 2021;2:76-93. — Systematic review and meta-analysis of 40 RCTs found qualitative evidence supporting colloidal oatmeal for atopic dermatitis; quantitative meta-analysis found no statistically significant difference vs placebo across CAM treatments.

2021Meta-analysis (mixed)PMID:34409356View source ↗

Sobhan M, Hojati M, Vafaie SY, et al. Colloidal Oatmeal Part I: History, Basic Science, Mechanism of Action, and Clinical Efficacy in the Treatment of Atopic Dermatitis. J Drugs Dermatol. 2020;19(10):s4-s7.

2020Meta-analysis (positive)PMID:33026768View source ↗
SqualaneAnecdotal evidence5 citations

A lightweight oil that mimics what your skin already makes. Softens and seals in hydration without feeling greasy.

Wolosik K et al., Squalane as a Promising Agent Protecting UV-Induced Inhibition of Collagen Biosynthesis and Wound Healing in Human Dermal Fibroblast, Molecules 2025;30(9):1964 — low-dose squalane (0.005-0.015%) restored collagen biosynthesis and wound healing in UVA-exposed human dermal fibroblasts

2025Mechanism onlyPMID:40363772View source ↗

Morgan AB et al., Explicating the multifunctional roles of tocotrienol and squalene in promoting skin health, Skin Health and Disease 2024;4(5):e448 — squalene/squalane promotes skin health via antioxidant, hydrating, emollient, anti-inflammatory mechanisms

2024Mechanism onlyPMID:39355739View source ↗

Fiume M et al., Safety Assessment of Squalane and Squalene as Used in Cosmetics, International Journal of Toxicology 2023;42(3_suppl):107S-109S — CIR expert-panel assessment concluding squalane is safe as a cosmetic ingredient

2023Safety assessmentPMID:37752766View 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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