Vitamin C, retinoids, niacinamide, exfoliants and targeted serums, reviewed for irritation, texture and what changed on skin.

The Nural backs off its heat as it nears your scalp and pauses itself when set down. It is a real feature, but cheaper high-speed dryers dry hair almost as fast.

Shark's $299.99 CryoGlow adds chilled under-eye pads to a red, blue and infrared LED mask. The cooling is a genuine differentiator, but it costs battery life, adds fan noise and makes the mask heavy.

The viral drugstore mascara delivers real length and clean separation for $13.99. It does not out-volumize the best prestige formulas, and the washable version trades staying power for easy removal.