Cos De Baha Retinol 2.5% Serum 30ml costs ৳1,190 in Bangladesh. It is in stock and ships cash on delivery nationwide from Shampoo BD. It was previously ৳1,590.
How do I know this bottle hasn't been refilled or relabelled?
Genuine Cos De Baha retinol arrives with an intact factory seal on the bottle neck and matching batch codes printed on both the label and outer carton. Any cloudiness, separation, or a seal that looks tampered with signals a refilled pack, so inspect these details before opening and contact us immediately if something seems wrong.
What's the right way to use this retinol serum, and when will I see results?
Apply three to four drops to completely dry facial skin in the evening, two or three times weekly if you're starting out, then gradually increase frequency as your skin adapts. First-time users often experience mild dryness or slight irritation in the first week, which typically settles as your skin builds tolerance to retinol.
How should I store this serum after it arrives?
Keep the sealed bottle in a cool, dark drawer or cabinet away from heat sources and bathroom steam, since retinol degrades when exposed to light and warmth. After opening, always cap it tightly and store it the same way, and the serum will remain stable for several months with proper care.
- Retinol concentration 2.5% in a 30ml dropper bottle ready to use.
- Always verify factory seal and matching batch codes to confirm authenticity.
- Apply to dry skin in evening, starting two to three times weekly.
English
অ্যাড কার্ট 
