Hair thinning affects many women as they age, especially after 40. This change can feel frustrating and even alarming. While many factors contribute to hair loss, hormones play a central role in this process. Understanding how hormones influence hair thinning can help women make informed decisions about care and treatment. How Hormones Affect Hair Growth Hair growth follows a natural cycle with three phases: growth (anagen), rest (telogen), and shedding (catagen). Hormones re