Round Lab Birch Juice Moisturizing Serum
By Nur → Last verified 9/12/2026
Price checked 9/12/2026
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What we found
Based on how this product compares to others in the serums category, cross-referenced against retailer listings and market data.
Strengths
- + Same trusted birch-sap formula family as Round Lab's well-reviewed sunscreen
- + Real formula includes ascorbic acid, beta-glucan, and licorice root extract alongside the birch sap and hyaluronic acid, more than a hydration-only serum
- + Genuinely lightweight, watery texture, confirmed via the brand's own description and multiple independent retailer listings, suits layering well
Worth knowing
- - Includes ascorbic acid (vitamin C), which some sensitive skin finds irritating, so patch test first
- - No award or ranking is recorded for this product on this site
Key ingredients
These are the ingredients Round Lab highlights for this product, cross-checked against general dermatological and cosmetic-chemistry sources, not a full INCI list.
Fragrance: confirmed fragrance-free.
| Ingredient | What it is | What it does for skin |
|---|---|---|
| Birch sap | Sap tapped from birch trees, used in Korean skincare as a lightweight hydrating base. | Commonly included for its hydrating, soothing properties, though it has less independent clinical research than more established actives. |
| Sodium hyaluronate | The salt form of hyaluronic acid, commonly used for its water solubility and stability in formulas; molecular weight varies by product rather than being uniformly smaller. | Draws and holds moisture the same way hyaluronic acid does; how easily it absorbs depends on the specific molecular weight used, which formulas don't always disclose. |
| Hyaluronic acid | A humectant naturally found in skin, capable of holding many times its weight in water. | Draws moisture into the skin's surface, helping it look and feel plumper and more hydrated. |
| Ascorbic Acid | Pure vitamin C, the classic reference form and among the most extensively studied, though prone to oxidizing (degrading) once opened. | A strong antioxidant that helps brighten and even skin tone; actual potency depends heavily on concentration, pH, and formulation, which isn't always disclosed, so it isn't automatically stronger than a stable derivative at an adequate dose. |
| Beta-glucan | A polysaccharide often derived from oats or yeast. | A soothing, hydrating ingredient studied for calming sensitive skin and supporting the barrier. |
| Dipotassium Glycyrrhizate (licorice root extract) | A specific compound isolated from licorice root, not the same thing as a whole licorice-root extract, used in skincare for its calming properties. | Has anti-inflammatory, soothing effects and is sometimes cited for mild brightening; a well-established ingredient in sensitive-skin formulas. |
What the brand says
Round Lab's own marketing claims, not our own findings.
- Marketed for dry and sensitive skin
- Lightweight, watery texture that absorbs quickly without residue
Research-Based
Our assessment comes from pricing, ingredients, and published information, not personal use, the same standard we apply across the site. This product hasn't been hands-on tested yet. See our Methodology for what that distinction means.
Price history
Current price is the lowest we've recorded so far.
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Frequently asked
How much does Round Lab Birch Juice Moisturizing Serum cost per mL?
$0.40 per mL (currently $20.00 for 50 mL).
Has Round Lab Birch Juice Moisturizing Serum been hands-on tested?
Not yet. Our assessment for this product comes from pricing, ingredients, and published information, not personal use, the same standard we apply across the site. See our Methodology for what that distinction means.
What are the key ingredients in Round Lab Birch Juice Moisturizing Serum?
The ingredients Round Lab highlights for this product include Birch sap, Sodium hyaluronate, Hyaluronic acid, Ascorbic Acid, Beta-glucan, Dipotassium Glycyrrhizate (licorice root extract).
Sources
Pricing and availability for this product were verified against the following retailer listings.