Just as heat helps to stimulate and increase the flow of blood on the scalp heat also has its own disadvantage when it has become e too much.
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The form of your hair’s keratin strands alters when it is exposed to intense heat.
Temperatures above 300°F convert -keratin to -keratin, resulting in brittle hair that has lost its elasticity and is more vulnerable to injury.
Your hair keeps its structure on a molecular level when the keratin is dissolved, and it’s not reversible.
A loss of moisture is one way that heat damaged hair manifests itself. Your hair is composed of several bonds, including 4% lipids, oils, and pigments, 17% water, and 79 per cent keratin proteins.
Water molecules are attached to keratin proteins in the cortex, which is the inner section of your hair strands.
When you use heat on your hair, the natural oils are stripped away, and the water molecules evaporate, altering the protein structure.
The high temperatures cause the water to evaporate quickly, affecting the structure of each
strand and perhaps cracking the cuticles, the hair’s outer layer, exposing the hair to further harm.
Like shingles on a roof, hair cuticles contain overlapping shingles. These shingles are closed and flat on healthy hair.
The shingles open and rise up when the hair is damaged, causing split ends and tangles. Cuticles that are elevated allow more moisture to exit.
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