The primary component found in hair and nails is keratin. Keratin is a fibrous structural protein that provides strength and resilience. It forms the structural framework of hair, nails, and the outer layer of skin, protecting against mechanical damage and environmental factors. This protein is produced by keratinocytes in hair follicles and nail beds and is responsible for the durable nature of these tissues. Keratin's unique structure enables it to withstand wear and tear, making it vital for maintaining hair and nail health. Its production is influenced by nutrition and overall health.