Why workplace support for menstrual health is worth the investment. The chapter explains how appropriate support builds trust between employees and employers, helps people feel included and reduces embarrassment. It then looks at how menstrual symptoms can influence career decisions, citing the share of working women who have considered leaving their jobs because of them. Readers see what employees say they want, such as greater support for women's health, flexible working, time off for healthcare appointments and menstrual leave. The chapter closes with the business case, including the cost of replacing an employee who leaves, which can reach up to twice their annual salary.