Cos De BAHA Retinol 2.5 Serum (Upgraded Version) Review

(Not sponsored. No affiliate links.)

What is it?

It is a serum with 2.5% pure retinol. Not diluted, not paired with palmitic acid to render retinyl palmitate. Or Hydroxypinacolone Retinoate aka granactive retinoid. Nope. Old school retinol. Pure one. All about retinol and how to use it I posted here (click to read).

Maximum strength I have had ever before was 1%. You remember Drunk Elephant A Passioni or The Ordinary 1% Retinol in Squalane. This concentration of retinol although not the biggest known in South Korea (there are eye creams with 3.8% retinol) caught my eye undoubtedly.

Cos De BAHA is relatively young South Korean brand who claims: ‘our products are created from the effective ingredients, formulated according to scientific research that determines the precise blend of the most effective scientific ingredients.’

Cos De Baha Retinol 2.5 Serum Review

Here are their claims on this RS Retinol 2.5 Serum:

Cos De BAHA 2.5% Retinoid Facial Serum designed to complement skin’s renewal procedure and decrease the advent of excellent traces and wrinkles. Thanks to its ability to boost skin-building compounds, Retinol is has long been the anti-wrinkle go-to! To maximize the anti-aging benefits even further, we added hyaluronic acid powder and Vitamin E to promote collagen production and smooth fine lines.

ANTI-AGING INGREDIENTS – Facial serum features a unique formula with retinol Niacinamide Hyaluronic Acid and Arginine to help bring newer skin to the surface and reduce the signs of aging. Our 72% Organic Retinol Serum helps counter the effects of aging and give your skin a youthful shine while making it feel soft and rejuvenated. Your face will not only feel moisturized and refreshed, but it will look vibrant as our Anti Wrinkle Serum begins to take effect.

EVENING SERUM 3 TIMES A WEEK WRINKLE TREATMENT – Designed for daily use smooth this retinol serum all over face and neck after skin has been cleansed and dried allowing wrinkle treatment to be absorbed quickly. /Cos De BAHA/

Package: With Paper box package, Reinforced container dedicated to cosmetics (None Glass Botle)/Cos De BAHA/

This particular serum is the newer, upgraded version that differs from the previous version in texture, colour and ingredients list. Previous version was more of a white emulsion and this one is more dry oil liquid type serum of a yellowish colour.

It comes in 30 ml /1.0 fl.oz non glass (but looks and feels like a glass) bottle with a pipette.

Serum itself is very thin, light and leaves no residue on skin.

Cos De Baha Retinol 2.5 Serum Review

How to use it?

After cleansing and toning, apply 1~2 drops of serum at night.

Caution – For pregnant women, consult a specialist to see if they can use the product in advance. Retinol is a photosensitive substance. Therefore, exposure to sunlight or ultraviolet light can cause irritation or irritation to the skin, so be sure to use it only at night.

Generally – After cleansing and toning your face. Apply 1~2 drops of serum at night. Do not wash or wipe after applying the serum. After applying this serum, we recommend using a skin moisturizer. Massage a small amount of cleanser to wet skin, avoiding eye area. It is also a good idea to apply one more part that you want to improve.

Sensitive – Is your skin sensitive? Please mix with other Pure Serum. If your skin has fully adapted to the ingredients, you can expect faster results with only the product in question. /Cos De BAHA/

Please read this post on how to use retinol products.

I use this serum 2 times a week in the evening. Always after toner, hydrator and prior the moisturizer.


Cos De Baha Retinol 2.5 Serum Ingredients

*Aloe Barbadensis Leaf Extract, Propanediol, Retinol, Sodium Hyaluronate, Niacinamide, 1,2-Hexanediol, Ploysorbate 20, Tocopheryl Acetate (Vitamin E), *Rosa Damascena Extract, *Lavandula Angustifolia Flower Extract, *Camellia Sinensis Leaf Extract, *Melissa Officinalis Leaf Extract, *Artemisia Vulgaris Extract, Disodium EDTA.

* Organic Ingredients, Organic 50%

Beautiful, short and engaged list of ingredients. Stripped of all the unnecessary things. This retinol is already teamed with hyaluronic acid and niacinamid to boost its action and added vitamin E is nice touch. Botanical extracts are nice extra.

The older version was more of an emulsion and with whitening agents:

Old version:

*Aloe Barbadensis Leaf Extract, Glycerin, Cyclopentasiloxane, Niacinamide, Betaine, Butylene Glycol, 1,2-Hexanediol, Cetearyl Olivate, Sorbitan Olivate, Butyrospermum Parkii (Shea)Butter, Retinol, Sodium Hyaluronate, Arginine, Panthenol, Adenosine, Allantoin, Tocopheryl Acetate, Cetearyl Alcohol, Caprylic/Capric Triglyceride, Microcrystalline Wax, Dimethiconol, Dimethicone, Petrolatum, Disodium EDTA, Carbomer, Xanthan Gum, *Rosa Damascena Extract, *Lavandula Angustifolia Flower Extract, *Camellia Sinensis Leaf Extract, *Melissa Officinalis Leaf Extract,m*Artemisia Vulgaris Extract

*Organic Ingredients, Organic 72%

I like the newer version far better.

Rosacea safe?

Yes, but… go really, and I mean really slow with this one. Buffer, buffer, buffer and hope for the best.

Who is it for?

All skin types, mature skin

Does it work?

This serum peeled my skin the first, the second and the third time I applied it. Didn’t matter that my skin is well-used and really good friend to high retinol concentrations. Well, this stuff is strong I tell you!

But when I finally adjusted the buffering type and amount, things started to change dramatically to face tune direction. All smooth, calm, almost poreless and wrinkle free. I fell in love with it. Such a modest little bottle with a bomb inside. After couple of months of cautious use, I saw my skin change like I never saw it before. Good change. And it gets better and better. Good enough reason for thumb up declaration.


Thumbs up?



    1. That depends on how strong do you want serum to kick. For the first time users or just getting used to retinol there should be no waiting time between these two. For stronger kick I wait for couple of minutes. Not more than that

      Liked by 1 person

      1. Hi! I bought it on eBay Cos De Baha store but you can also get it on their official web site or Amazon. This current situation with coronavirus and landed flights though makes this very hard to get outside Korea.


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