Keratin

Keratin is a tough, fibrous protein that forms the structural building blocks of hair, nails, and the outer layer of skin. It provides strength, protection, and resilience by forming long chains that create a sturdy, flexible barrier. Keratin's natural properties help cells withstand physical and environmental stress, keeping hair and nails durable and skin resilient. It is produced by specialized cells and can also be enhanced through treatments like keratin smoothing or conditioning products to improve appearance and strength.