Hair extensions—especially braiding hair and other add-in styles—are a staple of protective styling and a multibillion-dollar global industry. But new research is raising alarms that many extension ...

Whether you have thin hair that you're looking to bulk up, short hair that you want to lengthen, or are just in the mood to switch up your hairstyle without the commitment of a more permanent change, ...

A new study finds over 900 different chemicals in hair extensions, including some linked to cancer and reproductive harm.