7 Signs Your Expensive Hair Serum Is Actually Harming You

5. Dull and Lifeless Hair

Ironically, a serum meant to enhance your hair's shine can sometimes have the opposite effect. Over time, the buildup of certain ingredients, such as silicones, can lead to a dull, lackluster appearance. These compounds can create a barrier that prevents moisture and nutrients from penetrating the hair shaft, leading to dehydration and a loss of natural luster. If your hair appears dull despite regular serum use, consider incorporating clarifying treatments into your routine to remove buildup and restore your hair's natural shine.