Round Lab Birch Moisturizing Sunscreen SPF 50+ PA++++ Versus COSRX Vitamin E Vitalizing Sunscreen With Panthenol + Hyaluronic Acid SPF 50
Updated on March 10, 2025
Overview
What they are
These products are both sunscreens. They have a total of 8 ingredients in common
Cool Features
They both contain hyaluronic acid, SPF, Vitamin C and Vitamin E
Suited For
They're both likely to be good for anti aging, dry skin, sensitive skin, reducing pores, scar healing and better texture
Free From
They both do not contain any common allergens, parabens or sulfates
What's Inside
They both contain silicones
We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that needs an update? Let us know.
Ingredient Info
Round Lab Birch Moisturizing Sunscreen SPF 50+ PA++++ 40 ingredients
COSRX Vitamin E Vitalizing Sunscreen With Panthenol + Hyaluronic Acid SPF 50 35 ingredients
About this product
About this product
At a glance
Click on any of the items below to learn more
Round Lab Birch Moisturizing Sunscreen SPF 50+ PA++++ 40 ingredients
COSRX Vitamin E Vitalizing Sunscreen With Panthenol + Hyaluronic Acid SPF 50 35 ingredients
Key Ingredients
Benefits
Concerns
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
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. Stay hydrated!
Learn more about WaterAnother all-star ingredient is propanediol. Propanediol 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.
Learn more about Propanediol1,2-Hexanediol is a synthetic liquid and another multi-functional powerhouse.
It is a:
- Humectant, drawing moisture into the skin
- Emollient, helping to soften skin
- Solvent, dispersing and stabilizing formulas
- Preservative booster, enhancing the antimicrobial activity of other preservatives
Butylene Glycol (or BG) is used within cosmetic products for a few different reasons:
- It is a solvent, meaning that it helps to dissolve other ingredients. This also enhances the absorption of the product into one's skin.
- It is a humectant, which means that it helps attract moisture into the skin.
- It helps improve product application.
- It has mild preservative properties.
Overall, Butylene Glycol is a safe and well-rounded ingredient that works well with other ingredients.
Sodium Hyaluronate is hyaluronic acid's salt form. It is commonly derived from the sodium salt of hyaluronic acid.
Like hyaluronic acid, it is great at holding water and acts as a humectant. This makes it a great skin hydrating ingredient.
Sodium Hyaluronate is naturally occurring in our bodies and is mostly found in eye fluid and joints.
These are some other common types of Hyaluronic Acid:
Learn more about Sodium HyaluronateEthylhexylglycerin (we can't pronounce this either) is commonly used as a preservative and skin softener. It is derived from glyceryl.
You might see Ethylhexylglycerin often paired with other preservatives such as phenoxyethanol. Ethylhexylglycerin has been found to increase the effectiveness of these other preservatives.
A type of fatty alcohol. Fatty Alcohols are most often used as an emollient or to thicken a product. They are usually derived from natural fats and oils and therefore do not have the same drying or irritating effect as traditional alcohols.
Emollients help keep your skin soft and hydrated by creating a film that traps moisture in.
Behenyl Alcohol is usually derived from the fats in vegetable oils.
In 2000, Behenyl Alcohol was approved by the US as medicine to reduce the duration of cold sores.
Learn more about Behenyl AlcoholTocopherol (also known as Vitamin E) is a common antioxidant used to help protect the skin from free-radicals and strengthen the skin barrier. It's also fat soluble - this means our skin is great at absorbing it.
Vitamin E also helps keep your natural skin lipids healthy. Your lipid skin barrier naturally consists of lipids, ceramides, and fatty acids. Vitamin E offers extra protection for your skin’s lipid barrier, keeping your skin healthy and nourished.
Another benefit is a bit of UV protection. Vitamin E helps reduce the damage caused by UVB rays. (It should not replace your sunscreen). Combining it with Vitamin C can decrease sunburned cells and hyperpigmentation after UV exposure.
You might have noticed Vitamin E + C often paired together. This is because it is great at stabilizing Vitamin C. Using the two together helps increase the effectiveness of both ingredients.
There are often claims that Vitamin E can reduce/prevent scarring, but these claims haven't been confirmed by scientific research.
Learn more about TocopherolIngredient Ratings
Here's what our community thinks of the ingredients in these products.
When to use
Round Lab Birch Moisturizing Sunscreen SPF 50+ PA++++ 40 ingredients
COSRX Vitamin E Vitalizing Sunscreen With Panthenol + Hyaluronic Acid SPF 50 35 ingredients


Reviews
Here's what our community thinks
Round Lab Birch Moisturizing Sunscreen SPF 50+ PA++++ 40 ingredients
It's not the most hydrating sunscreen I've ever used and its texture is reminiscent of a slightly thick serum or an emulsion. It feels good on my skin and did not break me out. No white cast whatsoever, didn't require any blending in, and applied without a tacky finish. One of the sunscreens with the least pilling I've tried, but did very very very slightly pill on the area around the eyes after a Show more
This reef-safe chemical sunscreen stands out with its naturally glowy and non-greasy finish. It has the texture of a medium moist cream, spreads nicely and dries quickly in just a few minutes, making it easy to apply. It leaves no greasy or sticky residue, and there's no white cast or pilling to worry about. Notably, this sunscreen is highly moisturizing and can effectively replace the need for an Show more
COSRX Vitamin E Vitalizing Sunscreen With Panthenol + Hyaluronic Acid SPF 50 35 ingredients
I don’t believe the ingredients list on here is accurate, the sunscreen has a STRONG somewhat woodsy fragrance. Since the fragrance is crazy strong it stings my eyes so bad. :( although i don’t like it, i wanted to keep using it as i’m waiting for my yesstyle order that has the regular sunscreen i use, but ive noticed i started getting red, painful bumps on my cheeks :(