BiomarkersLDL cholesterol

Lipids

LDL cholesterol

The cholesterol most linked to heart disease

On your report it may say: LDL-C, Direct LDL

LDL carries cholesterol into artery walls, where it can build up into plaque. Lower LDL means lower heart attack and stroke risk over time.

Updated 2026-10-26

Typical ranges · mg/dL

Optimal below 100
Near optimal 100–130
Borderline high 130–160
High 160–190
Very high 190+

mmol/L = mg/dL ÷ 38.67

People with diabetes or heart disease have lower targets set by their doctor.

Ranges vary by lab, age and sex. The range printed on your report applies.

If it's low

Low LDL is good for heart health.

Common causes

  • Healthy diet
  • Cholesterol-lowering medicines

What you might notice

  • None

If it's high

Higher LDL increases heart disease risk, especially with other risk factors.

Common causes

  • Saturated and trans fats
  • Excess weight
  • Underactive thyroid
  • Inherited high cholesterol

What you might notice

  • Usually none

Testing

Who should test
All adults, at least every 4–6 years, and yearly with risk factors.
How to prepare
Fasting is often requested.
When to retest
6–12 weeks after starting changes or medicine.

What can help

SYNC doesn't change your plan from this result alone. Use these only alongside your doctor's advice.

Food sources

OatsPulsesNuts and seedsMustard and groundnut oil instead of vanaspati

See a doctor if LDL is 160 or above, or 190 or above (possible inherited cause).

Common questions

Should I take CoQ10 because I'm on a statin?

Ask your doctor; SYNC doesn't recommend it from lipids alone.

How fast can diet lower LDL?

Changes show in 6–12 weeks.

Explore further

Sources

  1. MedlinePlus (US National Library of Medicine): Cholesterol levels

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For general education only, not medical advice. Ranges shown are typical for adults; the range printed on your lab report applies. Talk to a qualified doctor about your results.