India, April 15 -- Hair colouring has evolved from a beauty choice to a regular grooming habit, but not all colours are created equal. Many conventional dyes rely on harsh chemicals like hydrogen peroxide (HPO), PPD, and ammonia that can silently damage your hair and scalp over time. In a conversation with HT Lifestyle, Dr Harinder Arya, director and chief scientist, Sadaway Pvt. Ltd., shared signs your current hair colour may be doing more harm than good.

Dr Arya highlighted that hair starts feeling coarse and straw-like due to repeated moisture loss. This often indicates the cuticle has been compromised due to constant hair colouring.

"Chemical stress can weaken the roots, leading to noticeable shedding post-application. Over time, th...