Heterozygous familial hypercholesterolemia is a genetic condition that causes high levels of cholesterol in the blood. It occurs when a person inherits one copy of the faulty gene from one parent, leading to elevated low-density lipoprotein (LDL) cholesterol levels. This can increase the risk of heart disease and other cardiovascular issues at a younger age. Individuals with this condition often have cholesterol levels that are significantly higher than normal, even in childhood. Early diagnosis and treatment, which may include lifestyle changes and medications, are essential to manage cholesterol levels and reduce the risk of heart-related complications.