Here's a breakdown:
* Keratin (around 90%): This is a fibrous structural protein that is also the main component of skin and nails. It's tough, insoluble, and provides strength and structure to the hair.
* Water (around 10-15%): Hair contains water which helps maintain its flexibility and pliability. The exact percentage varies based on humidity and hair health.
* Lipids (3-6%): Lipids such as sebum, ceramides, and cholesterol contribute to the hair's shine, manageability, and waterproof properties.
* Pigments (Melanin): Melanin determines hair color. Eumelanin produces brown and black shades, while pheomelanin produces red and yellow shades.
* Trace elements: Hair also contains small amounts of other elements like minerals, vitamins, and metals.
Therefore, Keratin is by far the most significant component.