7. Lack of Improvement Over Time

If your skin shows no noticeable improvement after several weeks, your products may not be addressing your specific concerns. Evidence-based routines typically deliver visible results within a reasonable timeframe, especially for issues like dryness, acne, or dullness. Recognizing when to switch products is vital—don’t waste time on formulas that aren’t working for you. For tips on how long to give skincare a chance, read this resource from Allure.