나sun
레티놀 성분 초보는 주 2~3회가 좋다내요. 그리고 피부가 뒤집어 지는지 사용해보고 써야해요
I thought retirol products were unconditionally good, so I was using them generously.
I am a little worried about this.
I am curious about which products can be used with retinol and which should not. I have heard that using them with ingredients like Vitamin C, AHA, or BHA can cause severe irritation; is this true?
Please also tell me the order of use, precautions, and how beginners can use it safely.
thank you