What Is the LDL to Triglyceride Ratio?
The LDL to triglyceride ratio is calculated by dividing your LDL cholesterol level by your triglyceride level, both typically measured in mg/dL. While not yet a mainstream marker like HDL or total cholesterol, this ratio can provide additional insights into lipid metabolism and heart disease risk.
Why It Matters
A high LDL to triglyceride ratio may suggest an increased risk of atherosclerosis, a condition where arteries become clogged with fatty substances, leading to heart attacks or strokes. Conversely, a low ratio can sometimes indicate healthier lipid balance or, in some cases, underlying metabolic issues, depending on the absolute values.
Research Insights
A 2020 study published in Lipids in Health and Disease found that abnormal LDL/TG ratios were associated with higher incidence of coronary artery disease in certain populations [1]. Another study in the American Journal of Cardiology reported that combining traditional lipid metrics with ratios such as LDL/TG or TG/HDL improved cardiovascular risk prediction [2].
Optimal Ranges
There is no universal “ideal” LDL to triglyceride ratio, but a ratio between 0.5 and 2.0 is often considered typical. Ratios above 2.0 may warrant further evaluation by a healthcare provider, especially if other risk factors are present.
Example 1: Healthy LDL to Triglyceride Ratio
- LDL cholesterol: 2.5 mmol/L
- Triglycerides: 1.5 mmol/L
- LDL/TG Ratio: 2.5 ÷ 1.5 = 1.67
This is considered within a healthy range, as many clinicians regard a ratio below 2.0 (in mmol/L) as favourable.
Example 2: Elevated LDL to Triglyceride Ratio
LDL cholesterol: 4.0 mmol/L
- Triglycerides: 1.2 mmol/L
- LDL/TG Ratio: 4.0 ÷ 1.2 = 3.33
A ratio above 2.0–2.5 mmol/L could indicate increased cardiovascular risk, especially if paired with high blood pressure, insulin resistance, or low HDL cholesterol.
References
[1] Liu, X. et al. (2020). Association of LDL/TG ratio with coronary artery disease. Lipids in Health and Disease.
[2] Mora, S. et al. (2010). Lipid ratios and cardiovascular risk prediction. American Journal of Cardiology.