How does a cholesterol test workthe suresign cholesterol test uses a small sample of blood to determine yourampnbspcholesterolampnbsplevel the home cholesterol test kit allows you to place a sample onto the back of the test cassette and a colour change will occur indicating the level of cholesterol in the blood this can be compared with the colour chart supplied the deeper the colour the higher the level of cholesterolwhen to test routine measurement of blood cholesterol is recommended for me