Concert Pharmaceuticals stated its experimental therapy for alopecia areata might regrow hair in 30 to 40% of patients.
The small Lexington company is one of few with drugs in advanced clinical testing for an immune system condition that causes spotty or full hair loss.
Alopecia areata might cure up in months, although it usually lasts years. No authorised therapies exist.
Like many autoimmune disorders, it garnered little attention until recently, said Concert Pharma CEO Roger Tung.
Developing the treatment, he encountered persons with spontaneous anxiety and sadness. He responded, "This may ruin lives."
Tung claimed 300,000 to 1.5 million Americans may have the illness at once.