Yes, hair is primarily composed of keratin.
What is Keratin?
Keratin is a type of protein naturally produced by your body. It's a key structural component in several parts of your body, including your hair, skin, and nails. It also provides support and structure to glands and internal organs. [^1, ^12] Think of keratin as the building block that gives these tissues their strength and resilience.
Keratin's Role in Hair
Hair is a filamentous biomaterial, and keratin is its main protein constituent. ^10 This protein forms the basic structure of each hair strand, contributing to its strength, elasticity, and overall health. Keratin treatments, often used to smooth and straighten hair, work by adding extra keratin to the hair shaft, improving its appearance and manageability. [^4, ^12] These treatments are popular for reducing frizz and improving shine. [^4, ^6, ^7] However, it's important to note that some keratin treatments may contain chemicals with potential side effects. ^8
Different Types of Keratin Treatments
There are various keratin treatments available, ranging from shampoos and conditioners containing keratin to professional salon treatments that involve applying a keratin solution to the hair. [^9, ^11] While shampoos and conditioners containing keratin can improve hair quality, professional treatments aim for more significant changes in hair texture and manageability. [^2, ^3, ^5] The effects and cost of these treatments vary, with some lasting longer than others. ^5
[^1]: Keratin protein is a type of protein that makes up your hair, skin and nails, and is even found in your internal organs.
