Your skin cell turnover slows down as early as your 20s. By the time you hit your 30s new cells are visible only every 28-35 days, whereas they once turned over every 14 days or so.

This means dead cells start accumulating on the surface of the skin and interfering with light reflection, causing skin tone to appear uneven and dull.

Scroll down to view the best products and treatments for uneven skin tone.