Clearer, calmer, more even skin — powered by one of skincare's most effective and versatile active ingredients.
The Cos De BAHA Azelaic Acid 10% Serum delivers a clinically recognised concentration of Azelaic Acid in a lightweight, skin-friendly formula designed to tackle some of the most common skin concerns — blemishes, redness, dark spots, and uneven texture — without compromising your skin barrier in the process.
At 10%, this serum works at a strength that genuinely makes a difference. Azelaic Acid is widely celebrated in dermatology for its ability to clear congested pores, reduce inflammation, fade post-acne hyperpigmentation, and calm the visible redness associated with rosacea and reactive skin. It achieves all of this while remaining remarkably well-tolerated, making it one of the few active ingredients suitable for sensitive and acne-prone skin types alike.
The supporting cast of ingredients is equally impressive. Niacinamide works alongside the Azelaic Acid to brighten overall skin tone, regulate sebum production, and visibly reduce the appearance of enlarged pores. Sodium Hyaluronate draws moisture deep into the skin, while Panthenol (Pro-Vitamin B5) soothes and reinforces the skin barrier — ensuring the formula delivers results without unnecessary dryness or irritation.
Four botanical extracts round out the formula beautifully. Green Tea, Bitter Melon, Elderflower, and Edelweiss bring antioxidant, anti-inflammatory, and skin-conditioning properties that complement the actives and leave skin feeling balanced and nourished after every use.
The base of Aloe Barbadensis Leaf Extract gives the serum its lightweight, comfortable texture that absorbs quickly and layers effortlessly within any routine.
Best suited for: Acne-prone, oily, combination, sensitive, and rosacea-prone skin types.
Free from: Fragrance, parabens, silicones, sulfates, and unnecessary fillers.
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.
FAQs
What is Azelaic Acid and what does it do?
Azelaic Acid is a naturally occurring acid with well-documented skin benefits. It works to clear blemishes, reduce redness and inflammation, fade post-acne dark spots, and improve overall skin texture. At 10% concentration it delivers meaningful results while remaining gentle enough for daily use.
Is the 10% strength suitable for beginners?
If you're new to Azelaic Acid we recommend introducing it gradually — start by using it every other evening and build up to daily use as your skin adjusts. Most skin types tolerate it well even at 10%, but as with any active ingredient a patch test is always a good idea before applying it to your full face.
Can I use this if I have sensitive skin or rosacea?
Yes — Azelaic Acid is one of the few active ingredients widely recommended for sensitive and rosacea-prone skin. Its anti-inflammatory properties make it particularly effective at reducing the persistent redness and irritation associated with rosacea. If your skin is very reactive start slowly and monitor how your skin responds.
Can I use this alongside other active ingredients?
Azelaic Acid is generally very compatible with other skincare actives. It works well alongside Niacinamide, Hyaluronic Acid, and SPF. If you're using stronger exfoliants like AHAs, BHAs, or retinol we'd recommend using them on alternate evenings to avoid over-exfoliating.
When in my routine should I apply this serum?
Apply after cleansing and toning but before moisturiser. It can be used morning or evening — if using in the morning always follow with a broad spectrum SPF as Azelaic Acid can increase sun sensitivity with prolonged use.
Is this serum fragrance free?
Yes, the Cos De BAHA Azelaic Acid 10% Serum is completely fragrance free making it an excellent choice for those with sensitive or reactive skin.
Do you ship to Ireland?
Yes! We offer fast, reliable shipping across Ireland with orders typically delivered within 2–5 business days.
Is Cos De BAHA available in Irish stores?
Cos De BAHA is not widely stocked in physical stores in Ireland, making us one of the most convenient ways to shop this beloved K-Beauty brand with delivery straight to your door.