What is the effect of excess heat on hair?

Excess heat can significantly damage and weaken the hair structure. When hair is exposed to high temperatures—such as from styling tools like flat irons, curling wands, or even excessive sun exposure—the moisture in the hair shaft evaporates, leading to dryness. This prolonged exposure to heat can lead to various forms of damage, including breakage, split ends, and an overall unhealthy appearance. The protein structure of the hair, primarily keratin, may also be altered, making the hair less resilient and more prone to further damage. Understanding the detrimental effects of excessive heat is crucial for maintaining healthy hair, as professionals often recommend using heat protection products and minimizing heat styling to preserve hair integrity.