Round Lab Birch Juice Moisturizing Serum – Deep Hydration K-Beauty Serum for All Skin Types | 50ml

Some serums sit on top of your skin. This one sinks right in — and takes moisture with it. The Round Lab Birch Juice Moisturizing Serum is a lightweight, fast-absorbing hydration serum built around a beautifully simple idea: give your skin what it actually needs to stay plump, calm, and glowing all day.

At its heart is a clever 3-step moisture system: Glyceryl Glucoside opens up the skin's moisture pathways by promoting aquaporin production, Birch Sap boosts moisture retention deep within the skin, and Vita Hyaluronic Acid forms a protective barrier to seal it all in.  The result is hydration that doesn't just sit on the surface — it stays.

The 10,000ppm Betula Platyphylla Japonica Juice — birch sap harvested in spring from Inje's silver birch trees — is naturally rich in 17 amino acids, minerals, antioxidants, and vitamins, with a special ability to reduce inflammation, purify, and hydrate skin. Ascorbic Acid (Vitamin C) and Tocopherol (Vitamin E) add antioxidant protection and a subtle brightening boost, while Beta-Glucan soothes and supports skin repair.

Its lightweight, watery texture quickly penetrates the skin leaving no oily residue or build-up.  Suitable for all skin types including sensitive, dry, combination, and oily skin.

Key benefits: deep & lasting hydration · 3-step moisture pathway · plumping & fine line smoothing · anti-inflammatory birch sap · antioxidant protection · skin brightening · lightweight non-sticky texture · all skin types

💛 Why Seoulma Skincare Recommends It

If there's one serum we'd tell every K-beauty newcomer to start with, it's this one. The Round Lab Birch Juice Moisturizing Serum is the kind of product that quietly becomes non-negotiable — you don't notice how much it's doing until you skip it one morning and your skin immediately feels the difference.

What we love most is the story behind the star ingredient. In spring, before the leaves have even sprouted, birch tree sap is harvested from Inje's silver birch trees — a slightly sweet "white sap" naturally rich in amino acids, lactic acid, and hyaluronic acid, the very same building blocks the skin produces to keep itself hydrated.  It's nature doing what skincare has been trying to replicate for years.

The 3-step moisturizing pathway is what really sets this serum apart — it doesn't just dump hydration onto the skin, it first opens up the moisture channels, then fills them, then seals everything in.  That's smart, thoughtful formulation — and exactly the kind of K-beauty science we're here to share with you.

It layers beautifully under moisturiser and sunscreen, works for every skin type, and fits seamlessly into any routine. Whether your skin is tight after cleansing, dull from the colder months, or just in need of a little extra love — this is the one to reach for.

From Seoul to your doorstep — let your skin drink it in.