The Dewy Serum Resurfacing and Plumping Treatment

Tatcha The Dewy Serum does three jobs in one lightweight layer: gentle resurfacing from lactic acid, plumping hydration from hyaluronic acid, and a squalane finish that keeps the water where it landed. It's aimed at fine lines, loose-feeling skin and uneven texture.

What it actually does

• Resurfaces gently. The lactic acid comes from Hadasei-3™ and, per Tatcha, supports the skin's natural surface turnover while softening how fine lines and texture read on skin.
• Plumps with hydration. Hyaluronic acid replenishes moisture for a fuller, hydrated appearance.
• Locks it in all day. Squalane derived from sugarcane holds moisture in place.
• Replaces what age depletes. The brand's framing is that squalane and hyaluronic acid are both native to skin from birth and decline over time, so topping them up is what leaves skin looking plumper, dewier and smoother.
• Targets firmness too. The three concerns listed are uneven texture, wrinkles with fine lines, and firmness or elasticity that has slipped.
• Texture: a lightweight serum.
• Formula notes: cruelty-free.

Brand-reported results

From Tatcha's expert-graded four-week study covering 45 people who used it twice a day: at two weeks, all showed improvement in radiance and 98% showed improvement in texture. At four weeks, all showed improvement in both radiance and texture. Brand-conducted testing — individual results vary.

How to use

1. One to two pumps, massaged into clean, dry skin.
2. Twice a day — morning and night.
3. Follow with moisturiser, and SPF in the morning. It's a resurfacing serum, so daytime sun protection matters.

Is it right for you?

Questions

Is this an exfoliating acid serum?

It contains lactic acid, sourced from Hadasei-3™, for resurfacing — but Tatcha balances it with squalane and hyaluronic acid, which is why it's positioned as a three-in-one treatment rather than a peel. Use SPF during the day.

Can I really use it morning and night?

Yes — the instructions call for one to two pumps twice daily, and the brand ran its four-week study on exactly that frequency. If your skin is new to acids, start at night only and build up.

Do I apply it to damp or dry skin?

Dry. Tatcha specifies clean, dry skin for this one.

How long does delivery take?

Delivery takes 3 to 21 working days, depending on availability.

Payment and returns?

We take credit card, debit card, Instapay and mobile wallets — no cash on delivery. Returns are for defective, damaged or expired items only, reported within 1 day of delivery, refunded to the original payment method within 15–30 days.