ROUND LAB Birch Juice Moisturizing UVLock SPF 45+ Broad Spectrum — Efficacy 4.0/5.0, Safety 4.1/5.0 | DemythSkin
++++
[ DemythSkin Verdict ]
ROUND LAB Birch Juice Moisturizing UVLock SPF 45+ Broad Spectrum
ROUND LAB

ROUND LAB Birch Juice Moisturizing UVLock SPF 45+ Broad Spectrum

SunscreenSun Protection
Efficacy
Strong
4.0 / 5.0
Safety
Mostly Safe
4.1 / 5.0
System Verdict
Hydrating, cosmetically elegant chemical sunscreen with decent filters but avoid if you are sensitive to essential oils. 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.
Active Ingredients Detected
A Tier: Good BasicsProven Results
TOCOPHEROL (VITAMIN E)NIACINAMIDEAVOBENZONEHOMOSALATEOCTISALATEGLYCERINSODIUM HYALURONATEHYALURONIC ACIDALLANTOIN
B Tier: Supporting IngredientsPromising Ingredients
BUTYLOCTYL SALICYLATEPOLY C10-30 ALKYL ACRYLATEGLYCERYL GLUCOSIDEGLYCERYL POLYMETHACRYLATETRIETHOXYCAPRYLYLSILANEBIOSACCHARIDE GUM-1BENZOTRIAZOLYL DODECYL P-CRESOLDIETHYLHEXYL 2,6-NAPHTHALATEPOLYMETHYLSILSESQUIOXANE
C Tier: Marketing IdolsHype | Limited or Weak Data
SPARASSIS CRISPA EXTRACTBETULA PLATYPHYLLA JAPONICA JUICEARTEMISIA ANNUA EXTRACTPORTULACA OLERACEA EXTRACT
D Tier: Potential IrritantsBe Cautious
ANTHEMIS NOBILIS FLOWER OILPINUS SYLVESTRIS LEAF OIL
What Each Ingredient Does
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
Full Ingredient List (INCI)

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

Frequently Asked

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 (Strong) and 4.1 out of 5.0 for safety (Mostly Safe) on DemythSkin's independent ingredient analysis. Hydrating, cosmetically elegant chemical sunscreen with decent filters but avoid if you are sensitive to essential oils. Efficacy is solid for daily use thanks to a proper UVA filter (avobenzone) plus UVB filters, suppor

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 potential 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 axes: efficacy (whether the ingredients have clinical evidence of working) and safety (irritation and sensitisation risk). Ingredients are classified S through D against a database of over 3,000 compounds. No brand pays for a score.

Analyze on DemythSkin →

Analysis last updated: 2026-08-21. DemythSkin is an independent ingredient analyzer. Scores are computed by a deterministic rubric from published clinical evidence — no brand pays for a score.