Cos De Baha Salicylic Acid BHA 4% Serum costs ৳1,290 in Bangladesh. It is in stock and ships cash on delivery nationwide from Shampoo BD. It was previously ৳1,550.
How do I know this bottle is genuine and not refilled?
Authentic Cos De Baha Salicylic Acid arrives with a factory seal that shows no signs of tampering or previous opening. The label should be crisp, properly aligned, and display consistent printing throughout—look closely at batch codes and expiry dates, as blurred or uneven text suggests a counterfeit or relabelled container. Refilled packs often have loose caps, discolored labels, or inconsistent liquid clarity inside the bottle when held to light.
What is the right way to apply this serum and how often should I use it?
Apply just two to three drops to clean, dry facial skin each evening, working gently across the face and avoiding the eye area until your skin builds tolerance. Begin with two or three times weekly if you are new to chemical exfoliants, then gradually increase frequency as your skin adjusts over several weeks. Always follow with a moisturizer and use sunscreen during the day, since this serum makes skin more sun-sensitive.
What should a first-time user expect when starting this product?
Your skin may feel slightly warm or tingly for a few minutes after application, which is normal as the salicylic acid works to exfoliate the surface layer. Some people notice mild dryness or very slight redness in the first week—this typically settles as skin adapts to the ingredient. If irritation persists beyond one week or becomes severe, reduce usage frequency and ensure you are not combining this with other strong actives.
- Four percent salicylic acid concentration in liquid serum form for chemical exfoliation.
- Imported sealed bottle arrives intact with batch code and expiry information visible.
- Use two to three drops nightly; one bottle provides several weeks of regular application.
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