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Some By Mi Yuja Niacin 30 Day Blemish Care Serum Versus COSRX AHA/BHA Refresh Vitamin C Booster Serum

Serum
Serum
Korean Brand South Korea
Korean Brand South Korea

Updated on March 05, 2024

Overview

What they are

These products are both reef safe serums. They have a total of 6 ingredients in common

Cool Features

They both contain niacinamide and Vitamin C

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, dark spots and better texture

Free From

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

What's Inside

They both contain fragrances and oils

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
ph level
5

At a glance

Click on any of the items below to learn more

Notable Ingredients

Benefits

Concerns

Notable Ingredients

Benefits

Concerns

Ingredients Side-by-side

found in both products
Yuja Niacin 30 Day Blemish Care Serum
Citrus Junos Fruit Extract Skin Conditioning

Citrus Junos Fruit Extract comes from the Citrus Junos tree, or the Yuzu plant.

Disliked Full details ->
Niacinamide Smoothing
Niacinamide IconGood for Oily Skin IconHelps reduce Skin Redness IconGood for Minimizing Pores IconGood for Dark Spots IconHelps fight Acne IconHelps brighten skin Icon
NiacinamideNiacinamide Icon 6 Benefits

Niacinamide has emerged as an all-star ingredient due to its many benefits.

Caprylic/Capric Triglyceride Masking, Skin Conditioning

Caprylic/Capric Triglyceride is an emollient, solvent, and texture enhancer. It is considered a skin-softener by helping the skin prevent moisture loss.

1,2-Hexanediol Skin Conditioning, Solvent

1,2-Hexanediol is a multi-tasker ingredient. It acts as a preservative to increase shelf-life and can aid other preservatives in preventing microbe growth. 1,2-Hexanediol also helps the skin retain moisture as a humectant.

Hydrogenated Polyisobutene Emollient, Skin Conditioning
1 / 2

Hydrogenated Polyisobutene is a synthetic polymer. Polymers are compounds with high molecular weight. Hydrogenated Polyisobutene is an emollient and texture enhancer.

1 Com. / 2 Irr.
Bisabolol Masking, Skin Conditioning, Soothing
Helps reduce irritation Icon
Helps reduce irritationHelps reduce irritation Icon

Bisabolol is pimarily used to add fragrance to a product. However, it is also famous for helping soothe skin.

Carbomer Emulsion Stabilising, Gel Forming
1 / 0

Carbomer is a polymer of acrylic acid. Its main role is to create gel consistency within products.

1 Com. / 0 Irr.
Disliked Full details ->
Arginine Masking, Skin Conditioning
Not safe for Fungal Acne Icon
Not safe for Fungal AcneNot safe for Fungal Acne Icon

Arginine is an amino acid that is important for human development. Your body uses is it to produce hair keratin and skin collagen.

Brassica Campestris Seed Oil Skin Conditioning
Oil IconNot safe for Fungal Acne Icon
OilOil Icon Not safe for Fungal AcneNot safe for Fungal Acne Icon

Brassica Campestris Seed Oil is from the field mustard plant. This plant is classified as a cabbage.

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Xanthan Gum 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.

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Ethylhexylglycerin Skin Conditioning

Ethylhexylglycerin (we can't pronounce this either) is commonly used as a preservative and skin softener. It is derived from glyceryl.

Adenosine Skin Conditioning
Helps with Anti-Aging IconGood for Scar Healing Icon
2 Benefits

Adenosine is in every living organism. It is one of four components in nucleic acids that helps store our DNA.

Citrus Junos Peel Oil Astringent
Oil Icon
OilOil Icon

Citrus Junos Peel Oil comes from the Citrus Junos tree, or the Yuzu plant.

Unknown Full details ->
Melia Azadirachta Flower Extract Skin Conditioning

Melia Azadirachta Flower Extract is from the Neem tree. Neem trees originate from India.

Ocimum Sanctum Leaf Extract Skin Conditioning

Ocimum Sanctum Leaf Extract comes from the Holy Basil plant. Holy Basil is native to India.

Glycyrrhiza Glabra Root Extract Bleaching, Emollient, Skin Conditioning
Good for Dark Spots Icon
Good for Dark SpotsGood for Dark Spots Icon

Glycyrrhiza Glabra Root Extract is an extract of the roots of Licorice. It has been found to have several benefits such as skin hydrating, conditioning, and soothing.

Polyglyceryl-3 Diisostearate Emulsifying
4 / 0 May worsen Oily Skin IconNot safe for Fungal Acne Icon
2 Concerns

Polyglyceryl-3 Diisostearate is an emulsifer and emollient. It comes from Isostearic Acid and Polyglycerin-3.

4 Com. / 0 Irr.
Very Disliked Full details ->
Water 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.

Curcuma Longa Root Extract Masking, Perfuming
Fragrance Icon
FragranceFragrance Icon

Curcuma Longa Root Extract is from the spice, turmeric. Besides being a healthy and delicious spice, turmeric also has plenty of skincare benefits. It has anti-inflammatory, antioxidant, and anti-microbial properties.

Corallina Officinalis Extract Skin Conditioning

Corallina Officinalis Extract is from the red seaweed, Corallina Officinalis. This seaweed is found all over the world but is most common in the rocky shores of Great Britain and Ireland.

Glycerin Humectant, Skin Conditioning, Skin Protecting
0 / 0 Helps hydrate Dry Skin IconHelps brighten skin Icon
2 Benefits

Glycerin is already naturally found in your skin. It helps moisturize and protect your skin.

0 Com. / 0 Irr.
Althaea Officinalis Root Extract Skin Conditioning

Althaea Officinalis Root Extract is from a plant called the Marsh Mallow plant. This plant is indigenous to Europe, West Asia, and North Africa.

Oryza Sativa Bran Extract Skin Conditioning, Skin Protecting

Oryza Sativa Bran Extract comes from the outer layer of a rice kernel. It is a byproduct of milling rice, or the operation to produce a whole grain rice product.

Ascorbic Acid Antioxidant, Buffering, Masking
Vitamin C IconAntioxidant IconHelps reduce Skin Redness IconGood for Skin Texture IconHelps with Anti-Aging IconGood for Dark Spots IconGood for Scar Healing IconHelps brighten skin Icon
Vitamin CVitamin C Icon AntioxidantAntioxidant Icon 6 Benefits

Ascorbic Acid is is pure Vitamin C. This form makes up the largest amount of vitamin C found naturally in our skin.

Hydrogenated Lecithin Emulsifying, Skin Conditioning

Hydrogenated Lecithin is created from the hydrogenation of lecithin. Hydrogenation is a chemical reaction between molecule hydrogen and another element.

Ficus Carica Fruit Extract Humectant

Ficus Carica Fruit Extract comes from the fruit known as the fig. Figs are rich in antioxidants and helps hydrate the skin.

Punica Granatum Fruit Extract Skin Conditioning

You might know this ingredient as pomegranate fruit. It has been shown to have antioxidant, skin soothing and anti-aging benefits.

Morus Alba Fruit Extract Antioxidant
Antioxidant Icon
AntioxidantAntioxidant Icon

Morus Alba Fruit Extract is an antioxidant.

Ginkgo Biloba Leaf Extract Skin Conditioning

Ginkgo Biloba Leaf Extract comes from the leaves of the Ginkgo tree. This tree is native to China and has been used in traditional Chinese medicine for thousands of years.

Tocopherol Antioxidant, Masking, Skin Conditioning
0-3 / 0-3 Vitamin E IconAntioxidant IconHelps hydrate Dry Skin IconHelps with Anti-Aging IconGood for Scar Healing IconHelps brighten skin IconMay cause irritation Icon
Vitamin EVitamin E Icon AntioxidantAntioxidant Icon 4 Benefits May cause irritationMay cause irritation Icon

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.

0-3 Com. / 0-3 Irr.
Polyglyceryl-10 Stearate Skin Conditioning
Not safe for Fungal Acne Icon
Not safe for Fungal AcneNot safe for Fungal Acne Icon

Polyglyceryl-10 Stearate is a skin conditioner with emollient and emulsifier properties.

Very Disliked Full details ->
Panthenol Skin Conditioning
0 / 0 Helps reduce irritation Icon
Helps reduce irritationHelps reduce irritation Icon

Panthenol is a common ingredient that helps hydrate and soothe the skin. It can be found naturally in our skin and hair.

0 Com. / 0 Irr.
Sodium Ascorbyl Phosphate Antioxidant
Vitamin C IconAntioxidant IconHelps reduce Skin Redness IconGood for Skin Texture IconHelps with Anti-Aging IconGood for Dark Spots IconGood for Scar Healing IconHelps brighten skin Icon
Vitamin CVitamin C Icon AntioxidantAntioxidant Icon 6 Benefits

Sodium Ascorbyl Phosphate is a form of Vitamin C. It is the salt of ascorbic acid.

Biotin Antiseborrhoeic, Skin Conditioning

Biotin is a B vitamin that is naturally produced by our bodies. It is also called Vitamin H.

Folic Acid Skin Conditioning

Folic acid is a form of Vitamin B9. Our bodies use folic acid for creating new cells and for DNA repair.

Pyridoxine Skin Conditioning

We don't have a description for Pyridoxine.

Unknown Full details ->
Cyanocobalamin Skin Conditioning

Cyanocobalamin is the manufactured version of vitamin B12. Our bodies use B12 for cell production.

Linoleic Acid Cleansing, Emollient, Skin Conditioning
Helps hydrate Dry Skin IconMay worsen Oily Skin IconBad for Acne Prone Skin IconNot safe for Fungal Acne Icon
Helps hydrate Dry SkinHelps hydrate Dry Skin Icon 3 Concerns

Linoleic Acid is Vitamin F and a fatty acid. It is an emollient and helps thicken texture. Linoleic acid helps with hydrating skin and nourishing the skin's barrier. The top layer of skin, or epidermis, contains high amounts of linoleic acid naturally.

Riboflavin Cosmetic Colorant, Skin Conditioning

Riboflavin is Vitamin B2. Our bodies use riboflavin in the creation of skin, digestive tract lining, and blood cells.

Beta-Carotene Skin Conditioning

Beta-Carotene is a carotenoid. It is an antioxidant that converts to Vitamin A. Antioxidants help fight free-radicals. Free-radicals are molecules that may damage your skin cells, such as pollution.

Inositol Humectant

Inositol is a sugar alcohol naturally found in the human body. Our bodies use this ingredient in the process of growing new cells.

Thiamine Hcl Masking, Skin Conditioning

Thiamine Hcl is Vitamin B1. The HCL stands for hydrochloride. Thiamine HCL is created using thiamine chloride and hydrochloric acid.

Disodium EDTA

Disodium EDTA plays a role in making products more stable by aiding other preservatives.

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Limonene Perfuming, Solvent
Fragrance Icon
FragranceFragrance Icon

Limonene is a fragrance that adds scent and taste to a formulation.

Very Disliked Full details ->
Linalool Perfuming
Fragrance IconMay cause irritation IconEU Allergen Icon
FragranceFragrance Icon 2 Concerns

Linalool is a fragrance and helps add scent to products. It's derived from common plants such as cinnamon, mint, citrus, and lavender.

Very Disliked Full details ->
AHA/BHA Refresh Vitamin C Booster Serum
Actinidia Chinensis Fruit Extract Emollient, Skin Conditioning

Actinidia Chinensis is the extract from kiwi fruit. It contains antioxidants in the forms of Vitamin C and polyphenols.

Hylocereus Undatus Fruit Extract Skin Conditioning, Skin Protecting

We don't have a description for Hylocereus Undatus Fruit Extract.

Unknown Full details ->
Hippophae Rhamnoides Water Masking, Perfuming, Skin Conditioning
Fragrance Icon
FragranceFragrance Icon

Hippophae Rhamnoides Water is created by distilling parts of the seabuckthorn plant.

Unknown Full details ->
Butylene Glycol Humectant, Masking, Skin Conditioning
1 / 0

Butylene Glycol (or BG) is used within cosmetic products for a few different reasons:

1 Com. / 0 Irr.
Niacinamide Smoothing
Niacinamide IconGood for Oily Skin IconHelps reduce Skin Redness IconGood for Minimizing Pores IconGood for Dark Spots IconHelps fight Acne IconHelps brighten skin Icon
NiacinamideNiacinamide Icon 6 Benefits

Niacinamide has emerged as an all-star ingredient due to its many benefits.

1,2-Hexanediol Skin Conditioning, Solvent

1,2-Hexanediol is a multi-tasker ingredient. It acts as a preservative to increase shelf-life and can aid other preservatives in preventing microbe growth. 1,2-Hexanediol also helps the skin retain moisture as a humectant.

Glycolic Acid Buffering
AHA IconGood for Oily Skin IconGood for Skin Texture IconGood for Minimizing Pores IconHelps with Anti-Aging IconGood for Dark Spots IconGood for Scar Healing IconHelps brighten skin IconMay cause irritation IconMay worsen Rosacea Icon
AHAAHA Icon 7 Benefits 2 Concerns

Glycolic Acid is arguably the most famous AHA with a ton of research to back up its benefits.

Betaine Humectant, Skin Conditioning
Helps hydrate Dry Skin IconHelps reduce Skin Redness IconHelps reduce irritation Icon
3 Benefits

Betaine is a common humectant (a substance that promotes retention of moisture). It's known to be gentle on the skin and can help balance hydration.

Sodium Hydroxide Buffering

Sodium Hydroxide is also known as lye or caustic soda. It is used to adjust the pH of products; many ingredients require a specific pH to be effective.

Water 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.

Panthenol Skin Conditioning
0 / 0 Helps reduce irritation Icon
Helps reduce irritationHelps reduce irritation Icon

Panthenol is a common ingredient that helps hydrate and soothe the skin. It can be found naturally in our skin and hair.

0 Com. / 0 Irr.
Allantoin Skin Conditioning, Skin Protecting, Soothing
0 / 0 Helps reduce Skin Redness IconHelps reduce irritation IconGood for Scar Healing Icon
3 Benefits

Allantoin plays a role in soothing and moisturizing the skin. Because of this, it is often added to products with strong active ingredients.

0 Com. / 0 Irr.
Hydroxyethylcellulose Emulsion Stabilising, Stabilising

Hydroxyethylcellulose is used to improve the texture of products. It is created from a chemical reaction involving ethylene oxide and alkali-cellulose. Cellulose is a sugar found in plant cell walls and help give plants structure.

Glycerin Humectant, Skin Conditioning, Skin Protecting
0 / 0 Helps hydrate Dry Skin IconHelps brighten skin Icon
2 Benefits

Glycerin is already naturally found in your skin. It helps moisturize and protect your skin.

0 Com. / 0 Irr.
Polyglyceryl-10 Myristate Skin Conditioning
Not safe for Fungal Acne Icon
Not safe for Fungal AcneNot safe for Fungal Acne Icon

Polyglyceryl-10 Myristate isn't fungal acne safe.

Very Disliked Full details ->
Polyglyceryl-10 Laurate Skin Conditioning
Not safe for Fungal Acne Icon
Not safe for Fungal AcneNot safe for Fungal Acne Icon

Polyglyceryl-10 Laurate is an ester of lauric acid and Polyglycerin-10.

Very Disliked Full details ->
Sodium Hyaluronate Humectant, Skin Conditioning
0 / 0 Hyaluronic Acid Icon
Hyaluronic AcidHyaluronic Acid Icon

Sodium Hyaluronate is hyaluronic acid's salt form. It is commonly derived from the sodium salt of hyaluronic acid.

0 Com. / 0 Irr.
Adenosine Skin Conditioning
Helps with Anti-Aging IconGood for Scar Healing Icon
2 Benefits

Adenosine is in every living organism. It is one of four components in nucleic acids that helps store our DNA.

Ascorbyl Glucoside Antioxidant
Vitamin C IconAntioxidant IconHelps reduce Skin Redness IconGood for Skin Texture IconHelps with Anti-Aging IconGood for Dark Spots IconGood for Scar Healing IconHelps brighten skin Icon
Vitamin CVitamin C Icon AntioxidantAntioxidant Icon 6 Benefits

Ascorbyl Glucoside is a stable form of Vitamin C. It is created by combining glucose from starch.

Citrus Aurantium Bergamia Fruit Oil Masking, Perfuming
Fragrance IconOil Icon
FragranceFragrance Icon OilOil Icon

Citrus Aurantium Bergamia Fruit Oil is the oil from the bergamot orange. This bergamot is native to Italy.

Very Disliked Full details ->
Betaine Salicylate Antimicrobial
BHA IconGood for Oily Skin IconGood for Minimizing Pores IconMay worsen Rosacea Icon
BHABHA Icon 2 Benefits May worsen RosaceaMay worsen Rosacea Icon

Betaine Salicylate is considered a salicylic acid alternative.

Alpha-Arbutin Antioxidant, Bleaching, Skin Conditioning
Antioxidant IconGood for Dark Spots IconGood for Scar Healing Icon
AntioxidantAntioxidant Icon 2 Benefits

Alpha-Arbutin is made from hydroquinone and glucose. It may also be derived from the fermentation of soybeans.

Menthyl Lactate Masking, Refreshing

We don't have a description for Menthyl Lactate.

Unknown Full details ->
Mentha Haplocalix Extract Masking

We don't have a description for Mentha Haplocalix Extract.

Unknown Full details ->

Ingredients Explained

These ingredients are found in both products.

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

Smoothing
Loved

Niacinamide has emerged as an all-star ingredient due to its many benefits.

It is known to treat acne by reducing inflammation. It also helps fade dark-spots and strengthen the skin by promoting the growth of the ceramide barrier.

Other benefits include smoothing wrinkles and minimizing redness.

The cherry on top? Niacinamide can also help build keratin, a protein that keeps skin firm.

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.

Niacinamide can be mixed with other ingredients to boost benefits. For instance, it has shown to be effective when used with copper, folic acid, and zinc to treat acne.

Learn more about Niacinamide
Skin Conditioning, Solvent
Mixed

1,2-Hexanediol is a multi-tasker ingredient. It acts as a preservative to increase shelf-life and can aid other preservatives in preventing microbe growth. 1,2-Hexanediol also helps the skin retain moisture as a humectant.

In products that are water-based, this ingredient can help stabilize perfumes and fragrances. It can also help make the texture of products softer and more smooth.

Skin Conditioning
Loved

Adenosine is in every living organism. It is one of four components in nucleic acids that helps store our DNA.

Adenosine has many benefits when used. These benefits include hydrating the skin, smoothing skin, and reducing wrinkles. Once applied, adenosine increases collagen production. It also helps with improving firmness and tissue repair.

Studies have found adenosine may also help with wound healing.

In skincare products, Adenosine is usually derived from yeast.

Learn more about Adenosine
Skin Conditioning, Solvent
Loved

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
Humectant, Skin Conditioning, Skin Protecting
Loved

Glycerin is already naturally found in your skin. It helps moisturize and protect your skin.

A study from 2016 found glycerin to be more effective as a humectant than AHAs and hyaluronic acid.

As a humectant, it helps the skin stay hydrated by pulling moisture to your skin. The low molecular weight of glycerin allows it to pull moisture into the deeper layers of your skin.

Hydrated skin improves your skin barrier; Your skin barrier helps protect against irritants and bacteria.

Glycerin has also been found to have antimicrobial and antiviral properties. Due to these properties, glycerin is often used in wound and burn treatments.

In cosmetics, glycerin is usually derived from plants such as soybean or palm. However, it can also be sourced from animals, such as tallow or animal fat.

This ingredient is organic, colorless, odorless, and non-toxic.

Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.

Learn more about Glycerin
Skin Conditioning
Loved

Panthenol is a common ingredient that helps hydrate and soothe the skin. It can be found naturally in our skin and hair.

This ingredient is also referred to as pro-vitamin B5 or dexpanthenol in dermatology.

Panthenol is famous due to its ability to go deeper into the skin's layers. Using this ingredient has numerous pros (and no cons):

Like hyaluronic acid, panthenol is a humectant. Humectants are able to bind and hold large amounts of water to keep skin hydrated.

Once oxidized, panthenol converts to pantothenic acid. Panthothenic acid is found in all living cells.

Learn more about Panthenol

Ingredient Ratings

Here's what our community thinks of the ingredients in these products.

Yuja Niacin 30 Day Blemish Care Serum
28
6
9
2
liked
mixed
disliked
not rated
AHA/BHA Refresh Vitamin C Booster Serum
13
4
3
4
liked
mixed
disliked
not rated

When to use

40 Routines
60% use in am
40% use in pm
88% use every day
When to use See routines that use it ->