Sulfur + benzoyl peroxide
Keep them apartKeep them apart. Two drying acne actives at once - sulfur plus benzoyl peroxide can leave skin tight and flaky, and flaky skin breaks out more, which defeats the point.
Use one at a time, or on different areas (benzoyl peroxide on the oily T-zone, sulfur on an angry spot), and always buffer with a moisturizer.
If your routine already includes a retinoid or acids too, that's even more reason to schedule rather than stack - dryness compounds across all of them.
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