Round Lab Birch Moisturizing Sunscreen SPF 50+ PA++++ Versus Kiehl's Beyond Screen UV Serum SPF 50+ Facial Sunscreen
What's inside
What's inside
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningDibutyl Adipate
EmollientPropanediol
Solvent
Diethylamino Hydroxybenzoyl Hexyl Benzoate
UV Filter
Polymethylsilsesquioxane
Ethylhexyl Triazone
UV Absorber
Niacinamide
Smoothing
Methylene Bis-Benzotriazolyl Tetramethylbutylphenol
UV Filter
Coco-Caprylate/Caprate
Emollient
Caprylyl Methicone
Skin Conditioning
Diethylhexyl Butamido Triazone
UV Absorber
Glycerin
Humectant
1,2-Hexanediol
Skin Conditioning
Butylene Glycol
Humectant
Betula Platyphylla Japonica Juice
Skin Conditioning
Sodium Hyaluronate
Humectant
Hyaluronic Acid
Humectant
Glyceryl Glucoside
Humectant
Dipotassium Glycyrrhizate
Humectant
Allantoin
Skin Conditioning
Portulaca Oleracea Extract
Skin Conditioning
Artemisia Annua Extract
MaskingPinus Sylvestris Leaf Oil
Masking
Anthemis Nobilis Flower Oil
Masking
Acrylates/C10-30 Alkyl Acrylate Crosspolymer
Emulsion StabilisingSodium Stearoyl Glutamate
CleansingPolyacrylate Crosspolymer-6
Emulsion StabilisingEthylhexylglycerin
Skin ConditioningAscorbic Acid
Antioxidant
Adenosine
Skin Conditioning
Pentylene Glycol
Skin Conditioning
Behenyl Alcohol
Emollient
Poly C10-30 Alkyl Acrylate
Emulsion StabilisingPolyglyceryl-3 Methylglucose Distearate
Emulsifying
Decyl Glucoside
Cleansing
Tromethamine
BufferingXanthan Gum
EmulsifyingT-Butyl Alcohol
Perfuming
Tocopherol
Antioxidant
Carbomer
Emulsion StabilisingWater, Dibutyl Adipate, Propanediol, Diethylamino Hydroxybenzoyl Hexyl Benzoate, Polymethylsilsesquioxane, Ethylhexyl Triazone, Niacinamide, Methylene Bis-Benzotriazolyl Tetramethylbutylphenol, Coco-Caprylate/Caprate, Caprylyl Methicone, Diethylhexyl Butamido Triazone, Glycerin, 1,2-Hexanediol, Butylene Glycol, Betula Platyphylla Japonica Juice, Sodium Hyaluronate, Hyaluronic Acid, Glyceryl Glucoside, Dipotassium Glycyrrhizate, Allantoin, Portulaca Oleracea Extract, Artemisia Annua Extract, Pinus Sylvestris Leaf Oil, Anthemis Nobilis 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
Homosalate 7%
Skin Conditioning
Octocrylene 7%
UV Absorber
Ethylhexyl Salicylate 5%
UV Absorber
Butyl Methoxydibenzoylmethane 3%
UV Absorber
Water
Skin ConditioningGlycerin
Humectant
C15-19 Alkane
SolventPropanediol
Solvent
C12-22 Alkyl Acrylate/Hydroxyethylacrylate Copolymer
StabilisingTocopherol
Antioxidant
Sodium Stearoyl Glutamate
CleansingButylene Glycol
Humectant
Cetearyl Alcohol
Emollient
Sclerotium Gum
Emulsion StabilisingHydroxyacetophenone
Antioxidant
Caprylyl Glycol
Emollient
Sodium Starch Octenylsuccinate
AbsorbentGlyceryl Stearate
Emollient
Jojoba Esters
Emollient
Helianthus Annuus Seed Wax
Skin Conditioning
Hydroxypropyl Starch Phosphate
Trisodium Ethylenediamine Disuccinate
Carbomer
Emulsion StabilisingSodium Lactate
Buffering
Sodium Hydroxide
BufferingPolysorbate 20
Emulsifying
Polyglycerin-3
Humectant
Palmitoyl Tripeptide-1
Skin Conditioning
Palmitoyl Tetrapeptide-7
Skin Conditioning
Homosalate 7%, Octocrylene 7%, Ethylhexyl Salicylate 5%, Butyl Methoxydibenzoylmethane 3%, Water, Glycerin, C15-19 Alkane, Propanediol, C12-22 Alkyl Acrylate/Hydroxyethylacrylate Copolymer, Tocopherol, Sodium Stearoyl Glutamate, Butylene Glycol, Cetearyl Alcohol, Sclerotium Gum, Hydroxyacetophenone, Caprylyl Glycol, Sodium Starch Octenylsuccinate, Glyceryl Stearate, Jojoba Esters, Helianthus Annuus Seed Wax, Hydroxypropyl Starch Phosphate, Trisodium Ethylenediamine Disuccinate, Carbomer, Sodium Lactate, Sodium Hydroxide, Polysorbate 20, Polyglycerin-3, Palmitoyl Tripeptide-1, Palmitoyl Tetrapeptide-7
Reviews
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Butylene Glycol (or BG) is used within cosmetic products for a few different reasons:
Overall, Butylene Glycol is a safe and well-rounded ingredient that works well with other ingredients.
Though this ingredient works well with most skin types, some people with sensitive skin may experience a reaction such as allergic rashes, closed comedones, or itchiness.
Learn more about Butylene GlycolCarbomer is a high-molecular weight polymer of acrylic acid. It is used to form gels and thicken formulas.
Due to its large molecular size, carbomer has minimal skin penetration and is considered an inert ingredient.
A high amount of carbomer can cause pilling or balling up of products. Don't worry, most products contain 1% or less of carbomer.
Learn more about CarbomerGlycerin (or glycerol) is a compound naturally found in your skin. It's a powerhouse humectant that pulls water into the stratum corneum.
Topically, glycerin does several things at once:
Your skin makes glycerin on its own (mostly from sebaceous oil breakdown) and shuttles it to your outermost layer of skin, or your epidermis, via aquaporin-3.
Aquaporin-3 is a transporter that is essential for normal skin hydration, elasticity, and repair. Interestingly, mice lacking in AQP3 have dry and less elastic skin that can be fully corrected with glycerin.
This ingredient is non-irritating, plays well with almost every ingredient, and works across all skin types. Typical use is anywhere between 3-10% but can go up to 79% in some leave-on products.
Just know very high concentrations (>40%) can feel tacky in low humidity.
Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.
Learn more about GlycerinPropanediol is an all-star ingredient. It softens, hydrates, and smooths the skin.Â
It’s often used to:
Propanediol is not likely to cause sensitivity and considered safe to use. It is derived from corn or petroleum with a clear color and no scent.
Learn more about PropanediolSodium Stearoyl Glutamate is an amino-acid based emulsifier. It is made by combining stearic acid with L-glutamic acid and neutralizing it to a sodium salt.
As an emulsifier, it works mainly as an oil-in-water one and helps keep the oil and water in your formulas blended. It also contributes to a smooth, non-greasy skin feel.
This ingredient is biodegradable and commonly available in natural/COSMOS-certified grades.
Learn more about Sodium Stearoyl GlutamateTocopherol is a fat-soluble antioxidant known as Vitamin E.
You'll find this ingredient in the vast majority of skincare (for good reason). It works to neutralize free radicals, or unstable molecules generated by UV exposure, pollution, and other environmental stressors, before they can cause oxidative damage to your skin cells.
Topically applied tocopherol has been shown to protect against UV damage by ramping up the skin's own natural defense enzymes.
It also acts as a skin conditioning agent; some studies show that regular topical use can improve the skin's water-binding capacity over 2-4 weeks.
This ingredient is especially loved for being a team player. When combined with Vitamin C, the photoprotective effect of both ingredients roughly doubles and the combo also helps reduce UV-induced DNA damage.
This ingredient has some brightening potential but it's more of a prevention ingredient than spot-fader. Cell studies show it can slow down melanin production but it's worth noting that it's not the most powerful brightener out there.
In formulations, it also serves as a stabilizer that helps protect other oxidation-prone ingredients from degrading.
Concentrations usually range from 0.1-1% in most leave-on products.
Learn more about TocopherolWater. It's the most common cosmetic ingredient of all. You'll usually see it at the top of ingredient lists, meaning that it makes up the largest part of the product.
So why is it so popular? Water most often acts as a solvent - this means that it helps dissolve other ingredients into the formulation.
You'll also recognize water as that liquid we all need to stay alive. If you see this, drink a glass of water. Remember to stay hydrated!
Learn more about Water
