Cos De BAHA 2% Hydroquinone + Arbutin + Niacinamide 4% Serum Ingredients Explained

Published on January 16, 2023. Submitted by hyggeday.

Overview

What it is

Serum with 18 ingredients that contains AHA, BHA, hyaluronic acid and niacinamide

Cool Features

It is fungal acne (malassezia) safe and reef safe

Suited For

It has ingredients that are good for fighting acne, anti aging, brightening skin, oily skin, reducing pores, scar healing, dark spots and better texture

Free From

It doesn't contain any harsh alcohols, common allergens, oils, parabens, silicones or sulfates

Fun facts

Cos De BAHA is from South Korea. This product is used in 12 routines created by our community.

We independently verify ingredients and our claims are backed by peer-reviewed research. Does this product need an update? Let us know.

You should know

Here's our breakdown of the notable ingredients, benefits, and concerns we determined from the ingredients in this product. Click any item to learn more.

Notable Ingredients

AHA (2)
BHA
Niacinamide
Hyaluronic Acid

Benefits

Good For Oily Skin (2)
Redness Reducing
Skin Texture (2)
Reduces Large Pores (4)
Anti-Aging
Dark Spots (5)
Scar Healing (5)
Acne Fighting (2)
Brightening (4)

Concerns

Drying
Irritating (3)
Rosacea (4)
Eczema (2)

Ingredient Info

Click any item below to learn more and view relevant ingredients.
alcohol-free
silicon-free
fragrance-free
sulfate-free
paraben-free
oil-free
fungal-acne safe
reef-safe
eu-allergen-free
vegan
cruelty-free

Ingredients Overview

Here's our quick-to-read summary of the ingredients in this product. Keep scrolling if you'd like to learn more about what each ingredient does!
Ingredient
Features
1
Emollient, Humectant, Skin Conditioning
2
Solvent
3
Antioxidant, Bleaching, Skin Conditioning
Antioxidant IconGood for Dark Spots IconGood for Scar Healing Icon
4
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
5
Skin Conditioning, Solvent
6
Stabilising
Good for Dark Spots IconMay worsen Rosacea Icon
7
Buffering, Masking
AHA IconMay cause irritation IconGood for Skin Texture IconGood for Minimizing Pores IconGood for Scar Healing IconMay worsen Rosacea IconHelps brighten skin Icon
8
Buffering, Masking
9
Humectant, Skin Conditioning
0 / 0
Hyaluronic Acid Icon
10
Masking, Preservative, Skin Conditioning
BHA IconPreservative IconCan worsen Dry Skin IconGood for Oily Skin IconMay cause irritation IconGood for Minimizing Pores IconGood for Scar Healing IconHelps fight Acne IconMay worsen Eczema IconMay worsen Rosacea IconHelps brighten skin Icon
11
Antioxidant
Antioxidant IconGood for Dark Spots IconGood for Scar Healing Icon
12
Buffering, Humectant, Skin Conditioning
AHA IconMay cause irritation IconGood for Skin Texture IconGood for Minimizing Pores IconHelps with Anti-Aging IconGood for Dark Spots IconGood for Scar Healing IconMay worsen Eczema IconMay worsen Rosacea IconHelps brighten skin Icon
13
Skin Conditioning
14
Antimicrobial, Refreshing, Tonic
15
Skin Conditioning
16
Perfuming, Skin Conditioning
Fragrance Icon
17
Skin Conditioning
18

Ingredients Explained

This product contains 18 ingredients. Click on any ingredient to learn more about it
1
What it does: Emollient, Humectant, Skin Conditioning
Community Rating: Loved

Aloe Barbadensis Leaf Extract is an extract of the leaves of the aloe, Aloe barbadensis, Liliaceae.

You may know Aloe to be a good sunburn reliever and inflammation reducer. This is because it contains many components that are known to help reduce irritation and itchiness. These include vitamins, amino acids, polysaccharides, and more. The high water content of aloe also helps give a cooling effect.

Aloe contains the antioxidants Vitamins A, C, and E. These vitamins neutralize free radicals. Free-radicals are molecules that may damage your skin cells, such as pollution.

The aloe plant is naturally abundant in polysaccharides, a carbohydrate made of sugar molecules. Polysaccharides help hydrate your skin by mimicking your skin's natural carbohydrates.

As it is easily absorbed by the skin, aloe is a great moisturizer. It is both a humectant and emollient. Emollients help trap moisture in your skin, keeping your skin soft. Humectants draw water from the air to your skin.

Other components of aloe include sugars such as monosaccharides and polysaccharides, folic acid, choline, many common minerals such as calcium, fatty acids, amino acids, and Vitamin B12.

Aloe does not protect against UV rays, despite it soothing sunburns.

There are over 420 species of aloe but Aloe Barbadensis is the most commonly used for topical products.

Learn more about Aloe Barbadensis Leaf Extract
2
What it does: Solvent
Community Rating: Liked

Propanediol helps absorb ingredients into your skin, boosting their benefits. It can act as an emollient, making your skin softer. Propanediol can help products last longer by boosting the properties of preservatives within the formulation.

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 Propanediol
3
What it does: Antioxidant, Bleaching, Skin Conditioning
Community Rating: Loved

Arbutin is derived from the bearberry plant. It helps even out skin tone and reduce hyperpigmentation.

Arbutin blocks tyrosinase, an enzyme that starts the process of skin darkening. When applied to the skin, Arbutin works at a slow pace. This can make it less irritating than similar ingredients.

Arbutin has similar benefits to Kojic Acid

Learn more about Arbutin
4
What it does: Smoothing
Community Rating: 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
5
What it does: Skin Conditioning, Solvent
Community Rating: 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.

6
What it does: Stabilising
Community Rating: Mixed

Hydroquinone is used to treat hyperpigmentation, acne scars, and age spots.

According to the EU, this ingredient is a known skin sensitizer and is banned in cosmetics there. This ingredient is not allowed for over-the-counter sale in the US.

According to the FDA, hydroquinone may cause permanent skin discoloration, rashes, and facial swelling.

Hydroquinone works by decreasing the melanocytes in your skin. Melanocytes are cells that create melanin.

Gentle reminder that all skin tones are beautiful!

Learn more about Hydroquinone
7
What it does: Buffering, Masking
Community Rating: Disliked

Citric Acid is an AHA derived from citrus fruits (think oranges, lemons, and limes!).

If you spot Citric Acid near the end of an ingredient list, it's likely there as a pH adjuster rather than an active ingredient.

As an AHA, Citric Acid removes the top layer of skin cells from the newer layer of skin underneath. This helps skin to remove dark spots and look more even.

Read more about some other popular AHA's here:

Learn more about Citric Acid
8
What it does: Buffering, Masking
Community Rating: Mixed

Sodium Citrate is the sodium salts of citric acid. In skincare, it is used to alter pH levels and acts as a preservative.

Sodium Citrate helps maintain the pH of a product. Normal pH level of skin is slightly acidic (~4.75-5.5). The acidity of our skin is maintained by our glands and skin biome. Being slightly acidic allows our skin to create an "acid mantle". This acid mantle is a thin barrier that protects our skin from bacteria and contaminants.

Sodium Citrate is a chelating agent. It neutralizes metal ions from water and prevents them from binding to other ingredients. This ensures the other ingredients will not be altered.

Learn more about Sodium Citrate
9
What it does: Humectant, Skin Conditioning
Community Rating: Loved

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 Hyaluronate
10
What it does: Masking, Preservative, Skin Conditioning
Community Rating: Liked

Salicylic Acid (also known as beta hydroxy acid or BHA) is one of the most well-known ingredients for treating skin that struggles with blackheads and acne. It helps to exfoliate both the skin's surface and pores, and also acts as an anti-inflammatory agent.

This multitasking property makes it a great ingredient for cleaning out pores, controlling oil production, and reducing inflammation.

Unlike AHAs which are water soluble, Salicylic Acid is oil soluble. This means that it's able to exfoliate the inside of pores and reduce blackheads.

Concentrations of 0.5-2% are recognized by the U.S. FDA as an over-the-counter topical acne product.

It can cause irritation and/or dryness if one's skin already has a compromised moisture barrier, so it's best to focus on repairing that before introducing a Salicylic Acid into your routine.

In general, Salicylic Acid is a great ingredient for oily acne-prone skin.

While salicylic acid does not increase sun-sensitivity, we still recommend wearing SPF.

If you are looking for the ingredient called BHA or Butylated Hydroxyanisole, click here.

Learn more about Salicylic Acid
11
What it does: Antioxidant
Community Rating: Loved

Kojic acid comes from fungi and can also be from fermented foods.

Kojic Acid helps even out skin tone and reduce hyperpigmentation. It works by blocking tyrosine, an enzyme that starts the process of skin darkening.

Kojic Acid is antifungal and often used to treat fungal infections. Additionally, Kojic Acid can help fight bacteria with its antimicrobrial properties. A side effect may be treating acne caused by bacteria.

Kojic Acid has similar benefits to arbutin.

Learn more about Kojic Acid
12
What it does: Buffering, Humectant, Skin Conditioning
Community Rating: Loved

Lactic Acid is an AHA that is derived from fermenting lactose, a carbohydrate from milk. It removes the top layer of old and dead skin cells and helps increase cell turnover.

Benefits of Lactic Acid are that it can help to reduce large pores and reduce the effects of aging. Some potential downsides are that it can be bad for dry skin, cause irritation, worsen eczema, and worsen rosacea.

Not only does it help exfoliate the skin, it helps strengthen the skin's barrier. When applied, lactic acid helps the skin create ceramides.

Lactic acid is an over-the-counter chemical exfoliant that comes from the fermentation of lactose β€” a carbohydrate found in milk.

Legend has it that Cleopatra used to bathe in sour milk to help reduce wrinkles.

Read more about some other popular AHA's here:

Learn more about Lactic Acid
13
What it does: Skin Conditioning
Community Rating: Disliked

Hamamelis Virginiana Leaf Extract comes from the witch hazel plant.

Witch Hazel is an astringent, anti-inflammatory, antioxidant, and antibacterial ingredient. The tannin in witch hazel has a drying effect when used on skin and constricts proteins. This helps minimize the look of large pores. The tannins present and the fragrance may be sensitizing. The catechins in witch hazel have anti-inflammatory properties while the gallic acid is antibacterial.

Indigenous groups have used witch hazel to help treat inflammation, which was then used by early settlers to North America.

Learn more about Hamamelis Virginiana Leaf Extract
14
What it does: Antimicrobial, Refreshing, Tonic

Rosemary extract has antioxidant, anti-inflammatory, anti-bacterial, and astringent properties.

This ingredient has a natural fragrance due its small component of rosemary oil. The antioxidant properties from its rosmarinic acid, flavone, and phenolic acids.

15
What it does: Skin Conditioning

We don't have a description for Eucalyptus Globulus Leaf.

16
What it does: Perfuming, Skin Conditioning

Thymus Vulgaris Extract is a fragrance.

17
What it does: Skin Conditioning

We don't have a description for Aspalathus Linearis Extract.

18
What it does:
Community Rating: Disliked

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

It is a chelating agent, meaning it neutralizes metal ions that may be found in a product.

Disodium EDTA is a salt of edetic acid and is found to be safe in cosmetic ingredients.

Learn more about Disodium EDTA
Embed Ingredients

Here's what our community thinks of the 18 ingredients in this product ✨

44% are loved or liked
17% have mixed ratings
17% are disliked or very disliked
22% have no rating yet

When to use

Here's some more info on how this product is used by our community.

Directions

1. Apply serum to clean skin every other day and work your way up to daily use.
2. Be sure to wear sunscreen during the day on areas where you've used this serum.

1. Apply serum to clean skin every other day and work your way up to daily use.
2. Be sure to wear sunscreen during the day on areas where you've used this serum.

When to use

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