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Kosas Dreambeam Comfy Smooth Sunscreen SPF 40 Versus Beauty of Joseon Relief Sun : Rice + Probiotics SPF 50+ PA++++

Kosas Dreambeam Comfy Smooth Sunscreen SPF 40 Versus Beauty of Joseon Relief Sun : Rice + Probiotics SPF 50+ PA++++ This hybrid sunscreen covers the full UV range and blocks ~98% of UVB at SPF 40. This chemical sunscreen covers the full UV range and blocks ~98

Kosas Dreambeam Comfy Smooth Sunscreen SPF 40 Versus Beauty of Joseon Relief Sun : Rice + Probiotics SPF 50+ PA++++

This hybrid sunscreen covers the full UV range and blocks ~98% of UVB at SPF 40.

This chemical sunscreen covers the full UV range and blocks ~98% of UVB at SPF 50.

What's inside

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

Zinc Oxide 21.7%

Water

C13-15 Alkane

Caprylic/Capric Triglyceride

Butyloctyl Salicylate

Propanediol

Mica

Polyglyceryl-2 Dipolyhydroxystearate

Polyglyceryl-3 Diisostearate

Silica

C12-15 Alkyl Benzoate

Polyglyceryl-3 Polyricinoleate

Galactoarabinan

Allantoin

Fructooligosaccharides

Bioflavonoids

Glycoproteins

Bisabolol

Ceramide Ng

Lactic Acid

Sodium Hyaluronate

Palmitoyl Hexapeptide-12

Cyamopsis Tetragonoloba Gum

Tocopheryl Acetate

Disteardimonium Hectorite

Glycerin

Polyhydroxystearic Acid

Tribehenin

Isostearic Acid

Lecithin

Xanthan Gum

Sodium Chloride

Phytic Acid

Pentylene Glycol

Phenethyl Alcohol

CI 77891

CI 77491

CI 77492

Zinc Oxide 21.7%, Water, C13-15 Alkane, Caprylic/Capric Triglyceride, Butyloctyl Salicylate, Propanediol, Mica, Polyglyceryl-2 Dipolyhydroxystearate, Polyglyceryl-3 Diisostearate, Silica, C12-15 Alkyl Benzoate, Polyglyceryl-3 Polyricinoleate, Galactoarabinan, Allantoin, Fructooligosaccharides, Bioflavonoids, Glycoproteins, Bisabolol, Ceramide Ng, Lactic Acid, Sodium Hyaluronate, Palmitoyl Hexapeptide-12, Cyamopsis Tetragonoloba Gum, Tocopheryl Acetate, Disteardimonium Hectorite, Glycerin, Polyhydroxystearic Acid, Tribehenin, Isostearic Acid, Lecithin, Xanthan Gum, Sodium Chloride, Phytic Acid, Pentylene Glycol, Phenethyl Alcohol, CI 77891, CI 77491, CI 77492

Dibutyl Adipate

Diethylamino Hydroxybenzoyl Hexyl Benzoate

Polymethylsilsesquioxane

Ethylhexyl Triazone

Niacinamide

Methylene Bis-Benzotriazolyl Tetramethylbutylphenol

Coco-Caprylate/Caprate

Caprylyl Methicone

Diethylhexyl Butamido Triazone

1,2-Hexanediol

Butylene Glycol

Oryza Sativa Extract

Oryza Sativa Germ Extract

Camellia Sinensis Leaf Extract

Lactobacillus/Pumpkin Ferment Extract

Bacillus/Soybean Ferment Extract

Saccharum Officinarum Extract

Macrocystis Pyrifera Extract

Cocos Nucifera Fruit Extract

Panax Ginseng Root Extract

Monascus/Rice Ferment

Behenyl Alcohol

Poly C10-30 Alkyl Acrylate

Polyglyceryl-3 Methylglucose Distearate

Decyl Glucoside

Tromethamine

Carbomer

Acrylates/C10-30 Alkyl Acrylate Crosspolymer

Sodium Stearoyl Glutamate

Polyacrylate Crosspolymer-6

Adenosine

T-Butyl Alcohol

Tocopherol

Lactobacillus/Rice Ferment

Aspergillus Ferment

Saccharomyces/Rice Ferment Filtrate

Ethylhexylglycerin

Water, 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, Oryza Sativa Extract, Oryza Sativa Germ Extract, Camellia Sinensis Leaf Extract, Lactobacillus/Pumpkin Ferment Extract, Bacillus/Soybean Ferment Extract, Saccharum Officinarum Extract, Macrocystis Pyrifera Extract, Cocos Nucifera Fruit Extract, Panax Ginseng Root Extract, Monascus/Rice Ferment, Behenyl Alcohol, Poly C10-30 Alkyl Acrylate, Polyglyceryl-3 Methylglucose Distearate, Decyl Glucoside, Tromethamine, Carbomer, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Sodium Stearoyl Glutamate, Polyacrylate Crosspolymer-6, Adenosine, Xanthan Gum, T-Butyl Alcohol, Tocopherol, Lactobacillus/Rice Ferment, Aspergillus Ferment, Saccharomyces/Rice Ferment Filtrate, Pentylene Glycol, Ethylhexylglycerin

Reviews

Alternatives

Ingredients Explained

These ingredients are found in both products.

Ingredients higher up in an ingredient list are typically present in a larger amount.

Glycerin (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.

Pentylene Glycol (1,2-pentanediol) is a multitasking little diol with three main roles in a formula:

Research on alkanediols (the family pentylene glycol belongs to) show they work by disrupting microbial cell membranes. This disruption helps the primary preservative system in a product work more effectively at lower doses.

On the safety side, the Cosmetic Ingredient Review Expert Panel has concluded this ingredient to be safe as used in current cosmetic practices + concentrations.

Typical use levels in a formula run about 1-5%.

Propanediol is an all-star ingredient. It softens, hydrates, and smooths the skin.

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.

Water. 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!

Xanthan gum is used as a stabilizer and thickener within cosmetic products. It helps give products a sticky, thick feeling - preventing them from being too runny.

On the technical side of things, xanthan gum is a polysaccharide - a combination consisting of multiple sugar molecules bonded together.

Xanthan gum is a pretty common and great ingredient. It is a natural, non-toxic, non-irritating ingredient that is also commonly used in food products.

Similar Comparisons

The reference edit

Ingredients, questions
& further reading.

Connected source records selected through this article’s public topic index.

01

Formula cabinet

Ingredients & structured notes

Ingredient index

Ingredients Explained

  1. 01These ingredients are found in both products.
  2. 02Ingredients higher up in an ingredient list are typically present in a larger amount.
  3. 031,2-Hexanediol is a synthetic liquid and another multi-functional powerhouse.
  4. 04It is a:
  5. 05Humectant, drawing moisture into the skin
  6. 06Emollient, helping to soften skin
  7. 07Solvent, dispersing and stabilizing formulas
  8. 08Preservative booster, enhancing the antimicrobial activity of other preservatives
  9. 09Also known as Avobenzone, this ingredient is an oil-soluble used to absorb the full spectrum of UVA rays (peak 357 nm).
  10. 10It's one of the most effective UVA filters available but has a major caveat of photostability: avobenzone is susceptible to photodegradation.
  11. 11This means it can lose efficacy when exposed to sunlight without the help of a stabilizing agent.
  12. 12Studies show antioxidants (like vitamin E or vitamin C) and some UV filters (like octocrylene and Tinosorb S) can meaningfully improve its stability in a formulation.
  13. 13The maximum allowable concentration according to regulation is 3% in the US + Canada, and 5% in the EU, Australia, China, Korea, and ASEAN countries.
  14. 14It has a well-support safety profile: a comprehensive 2025 review found minimal toxicity with no evidence of carcinogenicity.
  15. 15Overall, avobenzone is a safe and regulated ingredient used in sunscreen for over 40 years.
  16. 16Butyloctyl Salicylate is a chemical UV filter structurally similar to octisalate. It is a photostabilizer, SPF booster, emollient and solvent. This ingredient helps evenly spread out ingredients.
  17. 17According to a manufacturer, it is suitable for pairing with micro Titanium Dioxide, Zinc Oxide, and pigments.
  18. 18Photostabilizers help stabilize UV-filters and prevents them from degrading quickly.
  19. 19Cetearyl alcohol is a waxy mixture of two fatty alcohols: cetyl alcohol and stearyl alcohol. It is an emollient and emulsifier.
  20. 20Despite having "alcohol" in its name, it has nothing to do with drying solvent alcohols; the FDA also allows "alcohol-free" products to contain fatty alcohols like this ingredient.
Source · skinsort.com
02

Product index

Related product references

03

Comparison edit

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