¹ no thermal hair damage detected after 100 cycles of 4 passes on thoroughly towel-dried hair. 
² technical testing vs naturally dried hair, dependent on consumer use
³ consumer testing, 148 women, July 2023.
⁴ technical test in a lab on brunette hair, measured vs naturally dried hair
⁵ Technical test measuring curl retention in a humidity chamber at 50% relative humidity
⁶ that combines hot air and heated styling plates
⁷ no thermal hair damage detected after 100 cycles of 4 passes in wet to style mode vs naturally dried hair
'Based on ownership of an electrical straightener, 38% of 1422 people surveyed in Australia owned a ghd straightener. Brand ownership study conducted Jan - Feb 2024 across straightener brands.
*see promotion TERMS AND CONDITIONS