In mice, the fight-or-flight response overactivates the cells, causing a drop in their numbers, which leads to loss of hair color. Ashley started at The Scientist in 2018. Before joining the staff, ...

"Blue shampoo contains blue-violet pigments that are deposited into the hair when you shampoo," explains Jamielynn De Leon, owner of Rogue House Salon in the East Village. "It neutralizes the ...