TATCHA Hydrating Serum — The Dewy Serum for Dry Skin, Hyaluronic Acid & Squalane

TATCHA The Dewy Serum is a lightweight 3-in-1 hydrating serum that gently resurfaces, plumps, and seals in moisture for smoother, more dewy-looking skin.

Designed around a trio of performance ingredients—lactic acid from fermented Japanese superfoods, multi-weight hyaluronic acid, and plant-derived squalane—this serum softens texture, restores hydration, and helps skin appear more radiant. Its formula is gentle enough for daily use in both morning and evening routines and layers easily after a watery essence and before moisturizer.

How does The Dewy Serum improve skin texture?

The formula uses naturally derived lactic acid produced via fermentation of Uji green tea, Akita rice, and Okinawa algae to encourage subtle surface renewal. That gentle AHA action helps smooth the look of fine lines and uneven texture without aggressive exfoliation.

• Contains fermented superfoods to generate mild lactic acid.
• Promotes natural surface turnover for softer-feeling skin.
• Appropriate for regular use—gentler than strong chemical peels.

What hydrates and plumps while preventing moisture loss?

The Dewy Serum combines multi-weight hyaluronic acid to draw and hold moisture within the skin and squalane to create a light lipid barrier that reduces transepidermal water loss. Together they plump the look of skin and keep hydration visible through the day.

• Hyaluronic acid in multiple molecular sizes for layered hydration.
• Squalane mimics skin’s natural oils to lock in moisture.
• Lightweight texture that won’t feel heavy under creams or makeup.

When and how should I use this serum in my routine?

For best results, apply The Dewy Serum after a hydrating essence and before your moisturizer, both morning and night if desired. A few drops spread over damp skin absorb quickly and enhance the performance of the products that follow.

• Use 2–4 drops on clean, damp skin for optimal absorption.
• Layer under moisturizer and sunscreen in the morning.
• Include in evening routine to support nightly skin renewal.

Is the formula clean and suitable for sensitive skin?

The Dewy Serum emphasizes skin-kind ingredients and a gentle fermentation-derived AHA rather than harsh acids, but as with any exfoliating ingredient, sensitivity can vary. Patch testing is recommended for those with reactive skin; if irritation occurs, reduce frequency or stop use.

• Formulated with gentle lactic acid from fermented Japanese superfoods.
• Free of overly aggressive chemical exfoliants in this blend.
• Patch test if you have known sensitivities to exfoliating acids.

Who is this for: The Dewy Serum suits anyone seeking a non-greasy hydration boost with mild surface renewal—ideal for dry to normal skin types looking to smooth texture, visibly plump, and achieve a dewier complexion. It also fits into layered skincare routines for those who use essences and serums and want a gentle, daily resurfacing step without heavy irritation.

Ingredients

SACCHAROMYCES/RICE FERMENT FILTRATE, GLYCERIN, PROPANEDIOL, AQUA/WATER/EAU, SQUALANE, GLYCERYL STEARATE, ISONONYL ISONONANOATE, BEHENYL ALCOHOL, DIMETHICONE, STEARYL ALCOHOL, CAMELLIA SINENSIS LEAF EXTRACT, CLADOSIPHON OKAMURANUS EXTRACT, SODIUM HYALURONATE, HYDROLYZED COLLAGEN, HYDROLYZED ELASTIN, BETAPHYCUS GELATINUM EXTRACT, CRAMBE ABYSSINICA SEED OIL, STEARYL GLYCYRRHETINATE, ASCORBYL TETRAISOPALMITATE, PHYTOSTERYL MACADAMIATE, TOCOPHERYL ACETATE, SODIUM DILAURAMIDOGLUTAMIDE LYSINE, SODIUM CHONDROITIN SULFATE, POLYGLYCERYL-10 EICOSANEDIOATE/TETRADECANEDIOATE, CELLULOSE GUM, HYDROXYETHYL ACRYLATE/SODIUM ACRYLOYLDIMETHYL TAURATE COPOLYMER, DISODIUM PHOSPHATE, POTASSIUM PHOSPHATE, ETHYLHEXYLGLYCERIN, SORBITAN ISOSTEARATE, POLYSORBATE 60, BUTYLENE GLYCOL, TOCOPHEROL, ALCOHOL, PARFUM/FRAGRANCE, PHENOXYETHANOL, CITRAL, LIMONENE, LINALOOL "