Home / Sunscreens / ROUND LAB Birch Juice Moisturizing Sun Stick SPF50+ PA++++
ROUND LAB Birch Juice Moisturizing Sun Stick SPF50+ PA++++
By Nur → Last verified 10/6/2026
Price checked 10/6/2026
Checked 2026-09-29.
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What we found
Based on how this product compares to others in the sunscreens category, cross-referenced against retailer listings and market data.
Strengths
- + Sustained demand in the Korean market
Worth knowing
- - Chemical filter (inferred: no mineral filters in INCI; one retailer states 'chemical filter'). Fragrance-free per INCI. Format-distinct from the locked Round Lab Birch Juice Moisturizing Sunscreen cream -- stick vs cream, not a rename.
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. |
| Niacinamide | A form of vitamin B3, one of the most studied ingredients in cosmetic dermatology. | Strengthens the skin barrier by boosting ceramide production, helps even out tone by limiting pigment transfer to skin cells, and can reduce the look of enlarged pores. |
| 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. |
| Allantoin | A soothing compound, naturally occurring in some plants and also made synthetically. | Calms irritation and supports skin healing, often paired with other barrier-focused ingredients. |
What the brand says
ROUND LAB's own marketing claims, not our own findings.
- Contains birch tree sap, aloe, kelp, and other plant-based extracts to hydrate, soothe and cool irritated skin
- Enriched with Niacinamide, Adenosine, and 12 types of Peptides for brightening and anti-aging benefits
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 Sun Stick SPF50+ PA++++ cost per g?
$1.53 per g (currently $29.00 for 19 g).
Has ROUND LAB Birch Juice Moisturizing Sun Stick SPF50+ PA++++ 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.
Has ROUND LAB Birch Juice Moisturizing Sun Stick SPF50+ PA++++ won any awards?
Yes -- #1 in Hwahae Beauty Awards 2022.
What are the key ingredients in ROUND LAB Birch Juice Moisturizing Sun Stick SPF50+ PA++++?
The ingredients ROUND LAB highlights for this product include Birch sap, Niacinamide, Sodium hyaluronate, Hyaluronic acid, Allantoin.