How to Safely Jump Tretinoin Strengths Without Wrecking Your Skin Barrier
If you’ve been stable on a lower-strength tretinoin for months and you’re now facing a big jump in concentration — because a smaller in-between strength simply isn’t sold where you live — it’s reasonable to be nervous. A skin barrier that’s well-acclimated to one strength can react unpredictably to a much stronger one, even in […]