My opinion on Cos by BAHA

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BHA cos is an Asian brand that I particularly like for its minimalist philosophy and formulas. alcohol-free and fragrance-free. Perfect for sensitive skins, it offers a wide range of targeted treatments based on powerful active ingredients such as tranexamic acid, niacinamide, and azelaic acid.

I tested several products from their range, some of which won me over, while others didn't work for me. Here's my comprehensive review, with details about their effects, their active ingredients, and my results.

1. Azelaic acid serum 10 %

This serum contains:

10 % of azelaic acid : to reduce hyperpigmentation, soothe redness, and treat rosacea.
Niacinamide and hyaluronic acid : to moisturize and even out skin tone.

💡 My experience :
Unfortunately, this serum had no noticeable effect on my pigmentation spot. Azelaic acid is not the most effective lightening ingredient for me. However, I really like its texture. light gelatinous, easy to apply and non-irritating.

2. Niacinamide 20 % + Zinc 4 % Serum

A real favorite This serum targets:

Sebum production : regulates without dehydrating.
Imperfections : reduces pores and soothes inflammation.
The sparkle : thanks to the presence of alpha-arbutin.

💡 Why do I love it?

Effect anti-acne visible.
Texture light and non-greasy which plumps up the skin.
Incredible value for money (€10 for 30 ml).

3. Alpha-Arbutin Serum 5 % + Niacinamide 5 %

This serum promises to treat:

Hyperpigmentation and acne scars.
Uneven skin tone.

💡 My experience :
Despite its fine promises, the’alpha-arbutin doesn't work for me, even at this concentration. However, the texture remains pleasant and gel-like. If this active ingredient works for you, this serum is an excellent option at an affordable price (€8-9).

4. AHA/BHA Toner + Niacinamide

This exfoliating toner contains:

Glycolic acid (AHA) and salicylic acid (BHA) : to smooth the skin texture.
Niacinamide : to unify and soothe.

💡 My opinion :
The texture is highly liquid and offers a gentle exfoliating effect. Skin texture is smoother and brighter without irritation. An excellent toner for sensitive skin types who want to introduce acids into their routine.

5. Hyaluronic Acid + B5 Hydrating Serum

A basic ultra-moisturizing, featuring:

Hyaluronic acid : to plump up the skin.
Panthenol and niacinamide : to soothe and strengthen the skin barrier.

💡 Why adopt it?
Its texture gelatinized Instantly penetrates and leaves skin feeling comfortable. It is a simple, effective serum that is perfectly suited to minimalist routines.

6. Vitamin C Serum 15 %

This serum contains:

15 % of vitamin C : to brighten the complexion and fade dark spots.
Hyaluronic acid and panthenol : to moisturize and soothe.

💡 My experience :
Another favorite This serum has:

Brightened my complexion.
Brought a true brilliance without irritation.

It's one of the few vitamin Cs that my skin tolerates perfectly. At less than €10, it's a must-have for sensitive skin.

7. Tranexamic acid serum 5 %

This serum targets:

Pigment spots.
Uneven skin tone.

💡 My opinion :
Although effective, I prefer other tranexamic acid serums that work faster for me, such as the one from The Inkey List. That said, its light texture and affordable price make it a good product for beginners.

My final verdict on Cos de BHA

This brand is a real gem for sensitive skin thanks to its alcohol- and fragrance-free formulas and its excellent value for money. Some assets didn't work for me, but that doesn't mean they won't work for you.

🌟 My favorites:

Niacinamide 20% Serum + Zinc 4% Serum.
Vitamin C Serum 15 %.
Peptide toner + Niacinamide.

In a nutshell: Cos de BHA is a must-have brand for a minimalist, targeted skincare routine that is suitable even for reactive skin. I will continue to explore their products, especially their high-performance serums.

And you, what are your favorite products from the brand? 😊

Users' opinions on COS DE BAHA serums

COS DE BAHA serums have won over many users thanks to their natural, effective formula. Here's a summary of the most frequent reviews:

Positive feedback

Intense hydrationA quality appreciated by people with dehydrated skin.
Pleasant texture, quickly absorbed without leaving a greasy film on the skin.
Visible improvement in complexion after a few weeks of regular use.
Good skin tolerance, even for sensitive skin.
Attractively priced compared to other marques serums with similar ingredients.
Respect for vegan and cruelty-free ethics, important for many consumers.

Negative opinions

Lack of instructions on the product label: for some users, clear instructions for use are missing.
Results are sometimes less spectacular than those promised by the brand, according to some people.

How to use COS DE BAHA products

To make the most of the benefits offered by serums COS DE BAHAto optimize your skincare routine:

After cleansing your face with a mild product, gently pat dry with a clean, dry towel.
Apply a few drops of serum to your face and massage gently to help the product penetrate.
Use regularly, morning and night, for optimal results.
Adapt your skincare routine to your skin's specific needs: combine different serums to better respond to any problems (hydration, brightening, healing...).
Be careful not to over-dose to avoid saturating the superficial layers of the epidermis, which could have a counter-productive effect.
If your skin is particularly sensitive, or if you fear an allergic reaction, perform a skin test before applying the product generously to your face.

Focus on COS DE BAHA's flagship Niacinamide serum

The serum Niacinamide is certainly the flagship product of the COS DE BAHA brand. It contains 5% of niacinamide, also known as vitamin B3, an active ingredient recognized for its moisturizing, anti-inflammatory and antioxidant properties, which are highly beneficial to the skin:

Improves skin elasticity and reduces fine lines and wrinkles.
Reduces sebum production and tightens pores, ideal for oily or blemished skin.
Reduces pigmentation spots and brightens the complexion thanks to its melanin-inhibiting properties.
Stimulates the cell renewal process for smoother, more luminous skin.

Niacinamide serum can be used alone or in conjunction with other serums to enhance results. Don't hesitate to adapt your skincare routine to your specific needs.

In a nutshell

COS DE BAHA products are appreciated by a large number of users for their natural, effective and ethically sound formulas. Reviews are generally positive, highlighting the intense hydration they provide and their pleasant texture. To reap the full benefits of these serums, it's essential to adapt your skincare routine to your skin's needs, and to use the products regularly. Take the time to discover and experiment with different serums to achieve optimum results for your skin.