What should you know about HDL and LDL blood tests?

The two results answer different questions. LDL carries cholesterol to tissues, while HDL carries cholesterol towards the liver for processing. A high or low value does not by itself confirm a disease or predict an individual event. The pattern across the lipid profile matters more than a single isolated reading. HDL is one form of cholesterol carried in the blood. The laboratory report may show it in mmol/L or mg/dL, and the reference range can vary. A result is not interpreted in isolation: LDL, triglycerides, total cholesterol, blood pressure, smoking, diabetes, kidney health and family history can all affect the plan.

Bring the full report and a list of medicines, supplements and relevant health conditions to your appointment. Ask whether the sample needed fasting and whether a repeat test is useful. Regular movement, a varied eating pattern, avoiding tobacco and managing conditions such as diabetes can support heart health, but treatment decisions should be personalised.

An HDL result alone is not an emergency. Seek urgent help for chest pressure, severe breathlessness, sudden weakness on one side, facial drooping, trouble speaking or sudden loss of balance. These symptoms can signal a cardiovascular emergency and need immediate assessment rather than waiting for a routine cholesterol review.

Ask what the HDL result means alongside LDL and triglycerides, what target is appropriate for your personal risk, whether another test is needed, and which lifestyle or medicines would make the greatest difference. Share any family history of early cardiovascular disease and mention recent illness or changes in treatment.