Versus

COSRX The Niacinamide 15 Serum Versus Some By Mi Yuja Niacin 30 Days Miracle Brightening Sleeping Mask

Serum
Overnight Mask
Korean Brand South Korea
Korean Brand South Korea

Updated on August 23, 2024

Overview

What they are

These products are both reef safe . They have a total of 8 ingredients in common

Cool Features

They both contain niacinamide and Vitamin E

Suited For

They're both likely to be good for fighting acne, anti aging, dry skin, brightening skin, sensitive skin, oily skin, reducing pores, scar healing and dark spots

Free From

They both do not contain any harsh alcohols, parabens or sulfates

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

Click any item below to learn more and see relevant ingredients

What's inside

What's inside

At a glance

Click on any of the items below to learn more

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

found in both products
Yuja Niacin 30 Days Miracle Brightening Sleeping Mask

Citrus Junos Fruit Extract 70.5%

Skin Conditioning

Water

Skin Conditioning

Butylene Glycol

Humectant
1 / 0 Helps hydrate Dry Skin Icon

Niacinamide 5%

Smoothing
Niacinamide IconGood for Oily Skin IconHelps reduce Skin Redness IconHelps reduce irritation IconGood for Minimizing Pores IconHelps with Anti-Aging IconGood for Dark Spots IconGood for Scar Healing IconHelps fight Acne IconHelps brighten skin Icon

Glycerin

Humectant
0 / 0 Helps hydrate Dry Skin IconGood for Scar Healing IconHelps brighten skin Icon

Panthenol

Skin Conditioning
0 / 0 Helps hydrate Dry Skin IconHelps reduce Skin Redness IconHelps reduce irritation IconGood for Scar Healing Icon

1,2-Hexanediol

Skin Conditioning
Helps hydrate Dry Skin Icon

Simmondsia Chinensis Seed Oil

Emollient
0-2 / 0 Oil IconHelps hydrate Dry Skin IconGood for Scar Healing IconNot safe for Fungal Acne Icon

Thuja Orientalis Leaf Extract

Antioxidant
Antioxidant Icon

Zanthoxylum Piperitum Fruit Extract

Skin Conditioning

Polygonum Cuspidatum Root Extract

Antioxidant
Antioxidant Icon

Mentha Piperita Leaf Extract

Skin Conditioning

Mentha Aquatica Leaf Extract

Skin Conditioning

Mentha Rotundifolia Leaf Extract

Tonic

Nelumbo Nucifera Flower Extract

Skin Conditioning

Hippophae Rhamnoides Fruit Extract

Skin Conditioning
Helps hydrate Dry Skin IconHelps reduce irritation Icon

Arbutin

Antioxidant
Antioxidant IconGood for Dark Spots IconGood for Scar Healing Icon

Glutathione

Good for Dark Spots Icon

Ascorbic Acid

Antioxidant
Vitamin C IconAntioxidant IconHelps reduce Skin Redness IconGood for Skin Texture IconGood for Minimizing Pores IconHelps with Anti-Aging IconGood for Dark Spots IconGood for Scar Healing IconHelps brighten skin Icon

Ascorbyl Glucoside

Antioxidant
Vitamin C IconAntioxidant IconHelps reduce Skin Redness IconGood for Skin Texture IconGood for Minimizing Pores IconHelps brighten skin Icon

Biotin

Antiseborrhoeic

Tocopherol

Antioxidant
0-3 / 0-3 Vitamin E IconAntioxidant IconHelps hydrate Dry Skin IconHelps with Anti-Aging IconGood for Scar Healing Icon

Cyanocobalamin

Skin Conditioning

Bisabolol

Masking
Helps reduce Skin Redness IconHelps reduce irritation IconGood for Dark Spots Icon

Ascorbyl Tetraisopalmitate

Antioxidant
Vitamin C IconAntioxidant IconHelps reduce Skin Redness IconGood for Dark Spots IconNot safe for Fungal Acne Icon

Menadione

Masking

Arginine

Masking
Good for Scar Healing IconNot safe for Fungal Acne Icon

Trehalose

Humectant
Helps hydrate Dry Skin Icon

Madecassoside

Antioxidant
Antioxidant IconHelps reduce Skin Redness IconHelps reduce irritation IconHelps with Anti-Aging Icon

Adenosine

Skin Conditioning
Helps hydrate Dry Skin IconHelps reduce irritation IconGood for Minimizing Pores IconHelps with Anti-Aging IconGood for Scar Healing Icon

Diphenylsiloxy Phenyl Trimethicone

Skin Conditioning
Silicon Icon

Caprylyl Methicone

Skin Conditioning
Silicon Icon

Inulin Lauryl Carbamate

Emulsion Stabilising

Behenyl Alcohol

Emollient
Fatty Alcohol Icon

Sorbitan Oleate

Emulsifying
3 / 0 Bad for Acne Prone Skin IconNot safe for Fungal Acne Icon

Sorbitan Isostearate

Emulsifying
1-2 / 0 Not safe for Fungal Acne Icon

Caprylyl/Capryl Glucoside

Cleansing

Polyisobutene

Xanthan Gum

Emulsifying

Carbomer

Emulsion Stabilising
1 / 0

Acrylates/C10-30 Alkyl Acrylate Crosspolymer

Emulsion Stabilising

Sodium Acrylate/Sodium Acryloyldimethyl Taurate Copolymer

Emulsion Stabilising

Dimethicone/Phenyl Vinyl Dimethicone Crosspolymer

Benzyl Glycol

Solvent

Ethylhexylglycerin

Skin Conditioning

Raspberry Ketone

Masking
Fragrance Icon

Disodium EDTA

Citrus Junos Peel Oil

Astringent
Oil Icon

Linalool

Perfuming
Fragrance IconMay cause irritation IconEU Allergen IconMay worsen Eczema IconMay worsen Rosacea Icon

Limonene

Perfuming
Fragrance IconMay cause irritation IconEU Allergen IconMay worsen Eczema IconMay worsen Rosacea Icon

Ingredients Explained

These ingredients are found in both products.

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

Skin Conditioning, Solvent

1,2-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 
Humectant, Masking, Skin Conditioning

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 Glycol
Skin Conditioning

Ethylhexylglycerin (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.

Smoothing

Niacinamide is a multitasking form of vitamin B3 that strengthens the skin barrier, reduces pores and dark spots, regulates oil, and improves signs of aging.

And the best part? It's gentle and well-tolerated by most skin types, including sensitive and reactive skin.

You might have heard of "niacin flush", or the reddening of skin that causes itchiness. Niacinamide has not been found to cause this.

In very rare cases, some individuals may not be able to tolerate niacinamide at all or experience an allergic reaction to it.

If you are experiencing flaking, irritation, and dryness with this ingredient, be sure to double check all your products as this ingredient can be found in all categories of skincare.

When incorporating niacinamide into your routine, look out for concentration amounts. Typically, 5% niacinamide provides benefits such as fading dark spots. However, if you have sensitive skin, it is better to begin with a smaller concentration.

When you apply niacinamide to your skin, your body converts it into nicotinamide adenine dinucleotide (NAD). NAD is an essential coenzyme that is already found in your cells as "fuel" and powers countless biological processes.

In your skin, NAD helps repair cell damage, produce new healthy cells, support collagen production, strengthen the skin barrier, and fight environmental stressors (like UV and pollution).

Our natural NAD levels start to decline with age, leading to slower skin repair, visible aging, and a weaker skin barrier. By providing your skin niacinamide, you're recharging your skin's NAD levels. This leads to stronger, healthier, and younger looking skin.

Another name for vitamin B3 is nicotinamide. This vitamin is water-soluble and our bodies don't store it. We obtain Vitamin B3 from either food or skincare. Meat, fish, wheat, yeast, and leafy greens contain vitamin B3.

The type of niacinamide used in skincare is synthetically created.

Learn more about Niacinamide
Antioxidant, Masking, Skin Conditioning

Tocopherol (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 Tocopherol
Humectant, Moisturising

Trehalose is a disaccharide made of two glucose molecules (glucose is sugar!). Trehalose is used to help moisturize skin. It also has antioxidant properties.

As a humectant, trehalose helps draw moisture from the air to your skin. This helps keep your skin hydrated.

Due to its antioxidant properties, trehalose may help with signs of aging. Antioxidants help fight free-radical molecules, unstable molecules that may damage your skin.

In medicine, trehalose and hyaluronic acid are used to help treat dry eyes.

Some animals, plants, and bacteria create trehalose as a source of energy to survive freeze or lack of water.

Learn more about Trehalose
Skin Conditioning, Solvent

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 Water
Emulsifying, Emulsion Stabilising, Gel Forming

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.

Learn more about Xanthan Gum

When to use

868 Routines
46% use in am
54% use in pm
91% use every day
When to use See routines that use it ->
36 Routines
14% use in am
86% use in pm
72% use every day
When to use See routines that use it ->

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3.43
Overall rating
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What people say
No Scent 58% Irritating 42% Absorbs Well 42%
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