Chlorine is commonly assumed to be the culprit behind Kermit-colored hair. But the truth is,Â anotherÂ compound designed to keep the pool clean may actually be whatâ€™s turning your hair green.
Copper sulfate is often added to swimming pools to combat algae, according to the authors of aÂ 2014 case studyÂ about a 15-year-old girl whose blonde hair was turning progressively green. â€œCopper compounds in the water bind to the protein on the surface of the hair shaft and deposit their color,â€ the researchers explain. (This can also occur if your home has new copper piping.)
Although blonde hair is the most likely shade to go green, â€œit happens to other colors also,â€ says Steve Pullan, a trichologist at the Philip Kingsley hair clinic in New York City. â€œYou just donâ€™t notice it as much.â€ As a hair scientist, he sees green-haired goddesses all summer long â€” and has noticed a trend among these clients: Theyâ€™ve often bleached their tresses.
â€œEven natural hair can become green,â€ Pullan tells Yahoo Health. But coloring your hair â€” especially when bleach is involved â€” makes the shaft of each strand more porous, allowing your locks to absorb the pool chemicals more easily. In fact, in a study called â€œThe Green Hair Problem,â€ conducted way back in 1979, researchers found that hair treated with peroxide or damaged by the sun was more likely to suck up copper.
Read Yahoo! Health