Breaking News Emails Get breaking news alerts and special reports. The news and stories that matter, delivered weekday mornings.

Dec. 15, 2015, 4:48 PM GMT / Updated Dec. 15, 2015, 4:48 PM GMT By Marcia Breen

Hundreds of women are coming forward claiming a popular celebrity-endorsed hair care product caused their hair to fall out and severely damaged their scalps.

More than 200 people in 40 different states have filed a class-action lawsuit against Wen Hair Care and infomercial giant Guthy-Renker, alleging that using the company’s cleansing conditioner resulted in baldness, rashes, scalp irritation, hair breakage and hair discoloration.

The products, which are designed, manufactured and sold by Chaz Dean, the self-purported hair stylist to Hollywood’s “Who’s Who,” and Guthy-Renker, the direct marketers behind the Proactiv acne treatment and other popular beauty products, are described as being a sulfate-free alternative to shampoo.

The companies, which have marketed the products heavily using near round-the-clock infomercials featuring celebrity testimonials from the likes of Brooke Shields, Alyssa Milano and Angie Harmon, say Wen products works as a “shampoo, conditioner, deep conditioner, detangler and leave-in conditioner,” but some women who have used the product say it has caused irreparable damage to their hair.