Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) High Blood Cholesterol ?
    ### Response:
    To understand high blood cholesterol (ko-LES-ter-ol), it helps to learn about cholesterol. Cholesterol is a waxy, fat-like substance thats found in all cells of the body.
                
Your body needs some cholesterol to make hormones, vitamin D, and substances that help you digest foods.
    