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Cos De BAHA Azelaic Acid 10% Serum Review

This post contains affiliate links. Product provided by Jolse.


As someone with fair, freckle-prone skin, I’m constantly looking for products to address hyperpigmentation and redness. I’ve heard lots of good things about azelaic acid, but haven’t owned any products where it was the star - until now.


Cos De BAHA Azelaic Acid 10% Serum promises to help with redness and pigmentation left behind by acne and blackheads, brighten the skin and repair the damaged tissue. It’s available on Jolse.

Cos De BAHA Azelaic Acid 10% Serum

How to use

  • Apply 1-2 drops after cleansing and toning at night

  • Gently pat in

  • Follow with the rest of your routine / moisturizer


The serum is clear and colorless with some noticeable thicker white inclusions. I do not notice a scent. The dropper bottle is glass, which always adds a certain level of luxury to my skincare ritual.

Cos De BAHA Azelaic Acid 10% Serum in the dropper

My impressions

I keep hearing how “inelegant” azelaic acid is, and that products with it are often thick, powdery, and sticky. This has not been my experience with Cos De BAHA Azelaic Acid 10% serum. I do see the somewhat powdery looking parts inside the solution, but once applied to the skin, I do not notice them. The serum is slightly thicker than some of my other non-azelaic ones, but it’s also not the thickest serum I’ve owned. It’s not sticky or otherwise unpleasant.


I’ve made a conscious effort to use this serum regularly to see what it can do for my skin. There is a gradual but noticeable reduction in redness, so I definitely think it’s working. The marketing materials discuss acne a lot, but I typically do not suffer from acne (aside from an occasional zit here and there), so I cannot evaluate those claims from personal experience.

Cos De BAHA Azelaic Acid 10% Serum on hand

The weather is getting warmer, which means my outside walks will get more and more sweaty and red, so I’m excited to have this on my sink to hopefully keep the skin tone more even. I’m a little sad that I haven't tried azelaic acid sooner. Centella asiatica is great when my skin is irritated or breaking out, but azelaic acid seems to address general redness from having fair skin.


As far as hyperpigmentation, it is hard for me to tease out the effects of just Cos De BAHA serum, because I take a total approach. I use daily SPF to prevent new issues, along with vitamin C, regular gentle exfoliation, retinoids, and tranexamic acid. All together, my skin definitely looks more even, but it’s difficult to tell which product is the superstar. But Cos De BAHA is definitely helping with the redness part.


Have you tried this serum? What did you think?


#CosDeBAHA #serum #azelaicacid #pigmentation


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Cos De BAHA Azelaic Acid 10% Serum ingredients: *Aloe Barbadensis Leaf Extract, Propylene Glycol, Azelaic Acid (10%), Polysorbate 20, 1,2-Hexanediol, Propanediol, Panthenol, Niacinamide, Sodium Hyaluronate,*Camellia Sinensis Leaf Extract,*Momordica Charantia Fruit Extract, *Sambucus Nigra Flower Extract,*Leontopodium Alpinum Extract.

*Mark: N.O.I.P 50%


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