What are normal cholesterol levels?
Blood cholesterol is measured in units called millimoles per litre of blood, or mmol/L.
As a rough guide, the total levels should be:
- 5 mmol/L or less for healthy adults
- 4 mmol/L or less for those at high risk
LDL levels should be:
- 3 mmol/L or less for healthy adults
- 2 mmol/L or less for those at high risk
An ideal level of HDL is above 1 mmol/L, because a lower level of HDL may increase your risk of heart disease.
When you have a blood cholesterol test, you might have your total cholesterol to HDL ratio calculated, too. Ideally, the ratio of total cholesterol to HDL should be below 4:1 as a higher ratio increases your risk of heart disease.