![[Product Question] Impulsively bought Cos de Baha's 2% hydroquinone serum last night to use on the dark hyperpigmentation scars on my back + legs. How to use safely/reduce risk of rebound hyperpigmentation? I'm a 4/5 on the Fitzpatrick skin type scale ... [Product Question] Impulsively bought Cos de Baha's 2% hydroquinone serum last night to use on the dark hyperpigmentation scars on my back + legs. How to use safely/reduce risk of rebound hyperpigmentation? I'm a 4/5 on the Fitzpatrick skin type scale ...](https://i.redd.it/vzgynortwd4a1.jpg)
[Product Question] Impulsively bought Cos de Baha's 2% hydroquinone serum last night to use on the dark hyperpigmentation scars on my back + legs. How to use safely/reduce risk of rebound hyperpigmentation? I'm a 4/5 on the Fitzpatrick skin type scale ...
![Selfie] [before & after] Cos de Baha azelaic acid Jan 22nd vs Feb 10th. I'll be posting more before & after photos since I've had improvements past Feb 10th. If you guys Selfie] [before & after] Cos de Baha azelaic acid Jan 22nd vs Feb 10th. I'll be posting more before & after photos since I've had improvements past Feb 10th. If you guys](https://i.redd.it/g827xv9botg41.jpg)
Selfie] [before & after] Cos de Baha azelaic acid Jan 22nd vs Feb 10th. I'll be posting more before & after photos since I've had improvements past Feb 10th. If you guys
![Witch Hazel in serum, Pass or It's okay? (Cos De Baha Arbutin 5% + Niacinamide 5%) Please see photos for caption! :) : r/tretinoin Witch Hazel in serum, Pass or It's okay? (Cos De Baha Arbutin 5% + Niacinamide 5%) Please see photos for caption! :) : r/tretinoin](https://preview.redd.it/rbg4up2xl7161.jpg?width=640&crop=smart&auto=webp&s=a4d525fc386e2f17fd36de5e0a924c8e6f106669)
Witch Hazel in serum, Pass or It's okay? (Cos De Baha Arbutin 5% + Niacinamide 5%) Please see photos for caption! :) : r/tretinoin
![Has anyone tried Cos De BAHA Azelaic Acid 10% serum? or any cos de baha products? it says here its made in korea. : r/KoreanBeauty Has anyone tried Cos De BAHA Azelaic Acid 10% serum? or any cos de baha products? it says here its made in korea. : r/KoreanBeauty](https://i.redd.it/cojghgbbaof41.jpg)