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ROUND LAB Birch Juice Moisturizing UVLock SPF 45+ Broad Spectrum ingredients: is it worth it?
Hydrating, cosmetically elegant chemical sunscreen with decent filters but avoid if you are sensitive to essential oils.

Hydrating, cosmetically elegant chemical sunscreen with decent filters but avoid if you are sensitive to essential oils.
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Efficacy is solid for daily use thanks to a proper UVA filter (avobenzone) plus UVB filters, supported by emollients and humectants for comfortable wear, but it lacks newer broad-spectrum filters and we cannot verify exact SPF or UVA strength beyond the label claim; niacinamide sits near the top but is likely at a moderate, not treatment-level percentage, so this functions mainly as a moisturizing sunscreen rather than a strong brightening or anti-aging treatment.
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DemythSkin rates ROUND LAB Birch Juice Moisturizing UVLock SPF 45+ Broad Spectrum 4.0/5 for efficacy and 4.1/5 for safety.
CONTAINS COMMON SENSITISERS⌄
Fragrance components and essential oils that more often cause reactions in sensitive skin: ANTHEMIS NOBILIS FLOWER OIL, PINUS SYLVESTRIS LEAF OIL. Most people tolerate them; patch test if your skin reacts easily.
ACTIVE INGREDIENTS BY TIER
Gold Standards
High clinical proof | Skin-transformativeReliable
Proven resultsPotent
Developing evidenceOverhyped | Marketing
Hype | Limited dataDocumented Irritants
Evidence-backed flagFORMULATION BASE (17)⌄
FULL INGREDIENT LIST⌄
WATER, ACRYLATES COPOLYMER, CAPRYLYL METHICONE, SPARASSIS CRISPA EXTRACT, TOCOPHEROL (VITAMIN E), NIACINAMIDE,POLYGLYCERYL-3 DISTEARATEAVOBENZONE, HOMOSALATE, CALCIUM ALUMINUM BOROSILICATE, 1,2-HEXANEDIOL, OCTISALATE, BUTYLOCTYL SALICYLATE, POLY C10-30 ALKYL ACRYLATE, CETEARYL ALCOHOL, TROMETHAMINE, GLYCERYL STEARATE CITRATE, BETULA PLATYPHYLLA JAPONICA JUICE, ARTEMISIA ANNUA EXTRACT, ANTHEMIS NOBILIS FLOWER OIL, ACRYLATES/C10-30 ALKYL ACRYLATE CROSSPOLYMER, GLYCERIN, BUTYLENE GLYCOL, SODIUM HYALURONATE, CARBOMER, ETHYLHEXYLGLYCERIN, HYALURONIC ACID, GLYCERYL GLUCOSIDE, PROPANEDIOL, PINUS SYLVESTRIS LEAF OIL, ALLANTOIN, PORTULACA OLERACEA EXTRACT, SODIUM STEAROYL GLUTAMATE, GLYCERYL POLYMETHACRYLATE, TRIETHOXYCAPRYLYLSILANE, PENTYLENE GLYCOL, METHYLPROPANEDIOL, BIOSACCHARIDE GUM-1, BENZOTRIAZOLYL DODECYL P-CRESOL, DIETHYLHEXYL 2,6-NAPHTHALATE, POLYMETHYLSILSESQUIOXANE About Birch Trees Queen of the Forest Birch Trees are refreshingly tall, snow white, and has been nicknamed
WHAT EACH INGREDIENT DOES (24)⌄
- WATER
- solvent for the formula
- ACRYLATES COPOLYMER
- film-former and texture stabilizer
- CAPRYLYL METHICONE
- lightweight silicone emollient
- SPARASSIS CRISPA EXTRACT
- botanical extract, soothing support
- TOCOPHEROL (VITAMIN E)
- antioxidant and formula stabilizer
- NIACINAMIDE
- brightening and barrier-support active
- POLYGLYCERYL-3 DISTEARATE
- emulsifier for oil-in-water systems
- AVOBENZONE
- UVA chemical sunscreen filter
- HOMOSALATE
- UVB chemical sunscreen filter
- CALCIUM ALUMINUM BOROSILICATE
- texture enhancer and filler
- 1,2-HEXANEDIOL
- solvent and co-preservative
- OCTISALATE
- UVB chemical sunscreen filter
- BUTYLOCTYL SALICYLATE
- emollient and sunscreen solvent
- POLY C10-30 ALKYL ACRYLATE
- thickener and stabilizing polymer
- CETEARYL ALCOHOL
- fatty alcohol emollient and thickener
- TROMETHAMINE
- pH adjuster and buffer
- GLYCERYL STEARATE CITRATE
- emulsifier and stabilizer
- BETULA PLATYPHYLLA JAPONICA JUICE
- birch sap humectant component
- ARTEMISIA ANNUA EXTRACT
- botanical extract, soothing support
- ANTHEMIS NOBILIS FLOWER OIL
- chamomile essential oil fragrance
- ACRYLATES/C10-30 ALKYL ACRYLATE CROSSPOLYMER
- gelling and stabilizing polymer
- GLYCERIN
- humectant for skin hydration
- BUTYLENE GLYCOL
- humectant and solvent
- SODIUM HYALURONATE
- hyaluronic acid salt humectant
EXTERNAL CITATIONS
Avobenzone: Wang SQ et al. Photoprotection: a review of the current and future technologies. Dermatol Ther. 2010;23(1):31-47.
Niacinamide: Draelos ZD. The multifaceted effects of niacinamide in skin care. Cutis. 2019;103(3):181-184.
Sodium Hyaluronate: Pavicic T et al. Efficacy of cream-based novel formulations of hyaluronic acid of different molecular weights in anti-wrinkle treatment. J Drugs Dermatol. 2011;10(9):990-1000.
DISCLAIMER: THIS ANALYSIS IS FOR INFORMATION ONLY. NOT MEDICAL ADVICE. AI-GENERATED DATA BASED ON PUBLICLY AVAILABLE INGREDIENT LISTS. VERIFY WITH A MEDICAL PROFESSIONAL.
A cheaper sunscreen that scores as high or higher
A different formula for the same concern (sun protection) that scores at least as high on both efficacy and safety.

ROUND LAB Birch Juice Moisturizing UVLock SPF 45+ Broad Spectrum: common questions
Is ROUND LAB Birch Juice Moisturizing UVLock SPF 45+ Broad Spectrum worth it?
ROUND LAB Birch Juice Moisturizing UVLock SPF 45+ Broad Spectrum scores 4.0 out of 5.0 for efficacy (Effective) and 4.1 out of 5.0 for safety (Gentle) on DemythSkin's independent ingredient analysis. Hydrating, cosmetically elegant chemical sunscreen with decent filters but avoid if you are sensitive to essential oils.
What are the key active ingredients in ROUND LAB Birch Juice Moisturizing UVLock SPF 45+ Broad Spectrum?
ROUND LAB Birch Juice Moisturizing UVLock SPF 45+ Broad Spectrum contains no gold-standard actives. Its formula is built on supporting and base ingredients rather than clinically transformative actives.
Does ROUND LAB Birch Juice Moisturizing UVLock SPF 45+ Broad Spectrum contain fragrance or known irritants?
DemythSkin flags these ingredients in ROUND LAB Birch Juice Moisturizing UVLock SPF 45+ Broad Spectrum as documented irritants: ANTHEMIS NOBILIS FLOWER OIL, PINUS SYLVESTRIS LEAF OIL.
How is ROUND LAB Birch Juice Moisturizing UVLock SPF 45+ Broad Spectrum scored?
DemythSkin grades every product on two independent scores: efficacy (whether the ingredients have clinical evidence of working) and safety (irritation and sensitisation risk). Ingredients are graded S through D against a database of over 3,000 compounds. Brand and price are not part of the score, and no brand pays for one.
Free scores for every product in the database, or see them on Sephora, Ulta and Amazon with the Chrome extension.