Hair is a hygroscopic- , meaning it absorbs and releases moisture from the air depending on the humidity levels.
This property explains why hair often feels frizzier or loses its shape in humid conditions.
Hydrogen Bonds
Weak bonds that form between water molecules and keratin, the main protein in hair.
These bonds are responsible for temporary changes in hair shape, such as curling or straightening.
Keratin
The structural protein that makes up hair, nails, and skin.
Keratin’s properties are influenced by humidity because its hydrogen bonds interact with water molecules in the air.