What the ratio is
Triglyceride/HDL = (fasting triglyceride mg/dL) / (HDL-C mg/dL). Simple division.
What it reflects
The ratio correlates with:
- Insulin resistance
- Small dense LDL particle pattern
- Visceral adiposity
- Cardiovascular event risk
- Metabolic syndrome
It's a proxy because all of these underlying conditions tend to raise triglycerides and lower HDL, moving the ratio.
Reference ranges
- <2: Optimal
- 2-3: Borderline
- 3-4: Insulin-resistant
- >4: Substantial dysfunction
Note: if working in mmol/L, divide differently (or convert to mg/dL first).
Why use it
- Free with every lipid panel
- No extra testing
- Identifies metabolic dysfunction missed by LDL-C alone
- Tracks improvement across visits
- Useful in patients with normal LDL-C but elevated cardiovascular risk
How to improve
Same things that improve insulin resistance:
- Reduce refined carbohydrates and added sugars
- Lose visceral fat
- Exercise (especially zone 2 cardio + resistance)
- Reduce alcohol
- Address sleep apnea
- GLP-1 therapy where indicated
Improvements in the ratio precede and predict broader metabolic improvement.
The clinical pearl: The trig/HDL ratio is the simplest cardiovascular risk insight you can extract from a basic lipid panel. Many patients with "normal cholesterol" have elevated ratios indicating metabolic dysfunction worth addressing.
Bottom line
Triglyceride/HDL ratio is a simple, free proxy for insulin resistance and cardiovascular risk. Calculable from any lipid panel. Useful for tracking metabolic improvement. Optimal target under 2.