Hair science is the study of hair structure, growth, and health. Hair is primarily made of a protein called keratin, which forms the hair shaft. Each hair grows from a follicle located in the skin, and its growth cycle includes phases such as anagen (growth), catagen (transition), and telogen (resting). Understanding hair science helps in addressing various hair-related issues, such as hair loss and dandruff. Factors like genetics, hormones, and environmental conditions can affect hair health. By studying these elements, researchers can develop treatments and products to improve hair care and promote healthy growth.