John Frieda Sheer Blonde Luminous Color Glaze

Nothing replaces regular trips to your colorist, but this between-salon touch-up sure tries. Its color effect is barely noticeable, but the shine boost is a deep-conditioner fake-out. Although the gentle ingredient mix makes it safe to use frequently, even without harsh ammonia or peroxide, it still manages to smell terrible. And the fine-haired might find the silicone too weighty. One bummer: The six shades cover blondes, redheads and brunettes, but you're out of luck if you have black hair.