Cholesterol is often seen as the enemy. We are continuously told to keep cholesterol levels down. However, the reality is that a healthy level of cholesterol is important for maintaining health, So cholesterol test is very important for your good health. Cholesterol helps build new cells, protects nerves, and produces hormones. The trouble comes when we eat too much cholesterol. When we consume too much, it can deposit in unhealthy places, including arteries.