Quick Summary:
Date Tested: 2/12/2024
In this ROUND LAB Birch Juice SPF50+ PA++++ sunscreen lotion review, I test a fantastically performing sunscreen…albeit with a catch (it dries out quickly).
The ROUND LAB Birch Juice PA++++ sunscreen is a chemical based formulation containing the active ingredients Diethylamino Hydroxybenzoyl Hexyl Benzoate, Ethylhexyl Triazone, Methylene Bis-Benzotriazolyl Tetramethylbutylphenol, and Diethylhexyl Butamido Triazone. I was not able to find the % content of the active ingredients however.
The ROUND LAB Birch Juice SPF50+ did a tremendous job filtering UVA by 99.94%, reducing UVB by 99.18%, and blocking total UVI by 99.89%. This is an exceptionally performing sunscreen. Good job Round Lab!
ROUND LAB Birch Juice SPF50+ PA++++ sunscreen lotion ingredients
Active ingredients: Diethylamino Hydroxybenzoyl Hexyl Benzoate, Ethylhexyl Triazone, Methylene Bis-Benzotriazolyl Tetramethylbutylphenol, and Diethylhexyl Butamido Triazone.
Inactive Ingredients: Water, Dibutyl Adipate, Propanediol, Polymethylsilsesquioxane, Niacinamide, Coco-Caprylate/Caprate, Caprylyl Methicone, Glycerin, 1,2-Hexanediol, Butylene Glycol, Betula Platyphylla Japonica Juice, Sodium Hyaluronate, Hydrolyzed Hyaluronic Acid, Glyceryl Glucoside, Dipotassium Glycyrrhizate, Allantoin, Portulaca Oleracea Extract, Artemisia Annua Extract, Pinus Sylvestris Leaf Extract, Chamomilla Recutita Flower Oil, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Sodium Stearoyl Glutamate, Polyacrylate Crosspolymer-6, Ethylhexylglycerin, Ascorbic Acid, Adenosine, Pentylene Glycol, Behenyl Alcohol, Poly C10-30 Alkyl Acrylate, Polyglyceryl-3 Methylglucose Distearate, Decyl Glucoside, Tromethamine, Xanthan Gum, T-Butyl Alcohol, Tocopherol, Carbomer
Manufacturers Website: www.roundlab.co.kr
ROUND LAB Birch Juice sunscreen lotion characteristics at a glance:
- Contains UV filtering active ingredients not approved by the US FDA.
- Birch Juice? or is it Birch moisture?
- Viscosity is medium-low.
Prepared slide ready for testing – BEFORE
The ROUND LAB Birch Juice sunscreen lotion has a medium low viscosity and distributes active ingredient very evenly. It has a good consistency.
AFTER
The ROUND LAB Birch sunscreen lotion exhibited major drying issues as evidenced by the slide after two hours of testing in the sunscreen tester.
ROUND LAB Birch moisture SPF50+ sunscreen lotion UV blocking test results
Ultraviolet light quick reference:
UVA: The Ultraviolet wavelength from 315nm – 400nm. The “Aging UV light” – Causes wrinkles.
UVB: The Ultraviolet wavelength from 280nm – 315nm. The “Bad UV light” – Causes skin cancer.
UVI: The global sun UV index. The more a sunscreen can reduce the level of UVI, the better.
UV test results:
Ultraviolet sensor readings:
| Before Sunscreen | After Sunscreen | % UV Blocked | |
| TEMP | 76.13 | 75.56 | |
| UVA | 45256 | 28.75 | 99.94% |
| UVB | 2243.5 | 18.5 | 99.18% |
| UVI | 26.535 | 0.03 | 99.89% |
Want to know more about how I test sunscreen? Head here to read about the details.
Testing notes:
I really like the tube design of this particular sunscreen and like the performance even more! The only thing which gives me pause is the major drying of the formulation. If you are using this product, please reapply often and evenly. I assume this would only be exacerbated during real world usage, but who knows…maybe the combination of face perspiration and moisture from the environment would aid in its integrity. Don’t take my word for it however.
Want to try the ROUND LAB Birch moisture SPF50+ PA++++ sunscreen lotion?
Very strong UV filtering performance. Dries out quickly.
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A little note on the drying: You might see this for more Korean sunscreens, because summer is monsoon season. From personal experience I can say that the humidity is often so high that laundry left outside does not dry and any bills left in your pockets when out and about will feel as if you’d sprayed them with water mist by the end of the day. I imagine that plays a role in the formulation, though I have no real expertise in this area whatsoever!