Which hair type tends to be more susceptible to damage from heat?

Fine hair tends to be more susceptible to damage from heat primarily due to its smaller diameter and structure. Because fine hair is thinner, it has a lower heat tolerance compared to coarser hair types. Heat tools such as blow dryers, curling irons, or flat irons can easily reach temperatures that fine hair cannot withstand without suffering from damage. This can result in issues such as dryness, brittleness, and split ends. Additionally, fine hair often lacks the natural oils that help to protect and nourish the hair shaft, making it even more vulnerable to the drying effects of heat styling.

Coarse hair, while it may require more heat to style effectively due to its thicker texture, has greater resilience against damage compared to finer strands. Curly hair can also be more resilient due to its natural texture, which provides some degree of protection. Thick hair, similar to coarse hair, tends to be less prone to heat damage, as the bulk of hair can better distribute and withstand the effects of heat.