When it comes to treating stubborn acne and signs of premature aging, the temptation to use every powerful active ingredient at once is high. Tretinoin is widely considered the “gold standard” of dermatology, but its effectiveness can be easily neutralized—or worse, turned into a source of chemical burns—if mixed with other potent actives without a deep understanding of skin chemistry. In 2026, the clinical consensus has shifted toward multimodal therapy. This strategy allows patients to harness the synergy of different ingredients while strictly separating their application times to prevent irritation and chemical inactivation. The Tretinoin and Benzoyl Peroxide Conflict: A…