What can excessive heat styling do to hair over time?

Excessive heat styling can lead to damage and dryness in hair over time due to the high temperatures involved in methods such as flat ironing, curling, or blow drying. Heat alters the protein structure of the hair, specifically the keratin, which can weaken the strands. This alteration can result in a loss of moisture, causing the hair to become brittle and prone to breakage. Additionally, as the hair moisture decreases, it may lose its natural luster and softness, further contributing to a dry and unhealthy appearance. Regular exposure to heat can compromise the integrity of the cuticle, the outermost layer of the hair, making it more susceptible to environmental factors and mechanical damage.