Small Dense LDL
Small dense LDL (sdLDL) is a subtype of LDL cholesterol made up of smaller, denser particles that are more easily able to penetrate artery walls and promote plaque buildup.
Category: lipids
Also known as: small dense ldl, sd-ldl, sdldl, small ldl, pattern b ldl, mali gusti ldl
Reference range: 0–40 mg/dL (Source: ABIM)
Standard unit: mg/dL
High values may indicate
High small dense LDL levels may indicate increased risk of coronary artery disease and atherosclerosis, even when total LDL cholesterol is within normal range.
Low values may indicate
Low small dense LDL levels are generally favorable and suggest a lower proportion of atherogenic LDL particles.
Frequently asked questions
- What is a normal Small Dense LDL level?
- A typical reference range for Small Dense LDL is 0–40 mg/dL (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- What units is Small Dense LDL measured in?
- Small Dense LDL is most commonly reported in mg/dL. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do Small Dense LDL reference ranges come from?
- BloodId uses ABIM standard reference ranges and educational information from MedlinePlus (see our methodology). Reference ranges still vary by lab, age, and sex, so always compare against your own report.
- Can I track Small Dense LDL over time?
- Yes. Upload results from any lab and BloodId charts your Small Dense LDL over time against its reference range, so you can see whether the trend is rising, falling, or stable.
Related biomarkers
Source: MedlinePlus, U.S. National Library of Medicine
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