Demi-permanent hair color is ammonia-free, slightly alters hair tone, and lasts between five to 12 washes. Unlike ...

Experts sound off.

Dec. 16, 2025 — If you search for hair dye on social media, you’ll mostly see inspo photos of women with brightly colored locks. But you’ll also find clips warning you that dying your hair isn’t so ...

At-home tips from a model, an artist and a professional colorist. By Kari Molvar Beauty School answers common beauty questions with help from creative people who’ve become experts on the job. Sign up ...

Zhaoming says to monitor how often you dye your hair carefully. “My advice is not to dye your hair more than once every three months, or no more than four times a year,” she says. “Reducing the ...