Gender inequalities exist in health outcomes. Women generally live longer than men but have higher rates of illness. This complex picture is explained by biological, social, and structural factors. Biologically, male and female bodies differ but cannot fully explain changing gaps over time and place. Socially, gender roles shape health behaviors, work, care responsibilities, and medical experiences. Structurally, women often face disadvantage due to unequal power, resources, and the feminization of poverty.