Home / Sunscreens / Round Lab Birch Juice Moisturizing UV Lock SPF 45 (US version)
Round Lab Birch Juice Moisturizing UV Lock SPF 45 (US version)
By Nur → Last verified 10/5/2026
Price checked 10/5/2026
Verified 2026-10-05 on the brand's US store: $24.99. Prices change often, so confirm on the retailer's page.
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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
- + Chemical sunscreen with avobenzone, homosalate and octisalate (SPF45)
- + Also contains niacinamide, birch sap, sodium hyaluronate and allantoin
Worth knowing
- - Not fragrance-free: the ingredient list includes essential oils (Anthemis Nobilis Flower Oil, Pinus Sylvestris Leaf Oil)
- - This is the US over-the-counter formula (SPF 45); one retail listing shows the same ingredients in a different order
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: The ingredient list includes essential oils, so it is not fragrance-free.
| Ingredient | What it is | What it does for skin |
|---|---|---|
| Avobenzone | A widely used chemical filter that absorbs long-wave UVA light. | Gives UVA protection, but it breaks down in sunlight unless it is stabilized by other ingredients.Note: May sting the eyes or irritate sensitive skin in some people. |
| Homosalate | A chemical UVB filter common in US sunscreens. | Absorbs UVB light and helps dissolve other filters in the formula.Note: Some regulators cap how much can be used, and some people choose to avoid it. |
| Octisalate | A chemical UVB filter, also called ethylhexyl salicylate. | Absorbs UVB light and helps stabilize filters such as avobenzone. |
| 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. |
| 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. |
| 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.
- SPF 45 broad-spectrum protection that hydrates
- Lightweight, fast-absorbing and non-greasy with a soft, dewy finish
- Zero white cast; moisturizer-like feel, good under makeup
- Birch sap and hyaluronic acid
- Good for sensitive and all skin types
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 UV Lock SPF 45 (US version) cost per mL?
$0.50 per mL (currently $24.99 for 50 mL).
Has Round Lab Birch Juice Moisturizing UV Lock SPF 45 (US version) 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 UV Lock SPF 45 (US version)?
The ingredients Round Lab highlights for this product include Avobenzone, Homosalate, Octisalate, Niacinamide, Birch sap, Sodium hyaluronate, Allantoin.
Sources
Pricing and availability for this product were verified against the following retailer listings.