cold_nano
Iron
- Joined
- May 23, 2026
- Posts
- 93
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Should I use 4% hydroquinone daily + tretinoin 3 nights/week, or 4% hydroquinone only 3 nights/week + tretinoin 3 nights/week? Which regimen is more effective and safer for treating hyperpigmentation which is mild to medium while minimizing irritation?
