TG/HDL ratio: what your result means.

Ratio of triglycerides to HDL; a practical proxy for insulin resistance. TG/HDL ratio is measured by blood test as part of the Metabolic panel in the HodieLabs Health Blueprint.

Why TG/HDL ratio matters

TG/HDL ratio is derived, no additional blood draw needed. Ratio <1.0 (mmol/L) indicates likely pattern A (large buoyant) LDL; >1.5 indicates pattern B (small dense).

Associated risks when out of range: Practical proxy for insulin resistance and small dense LDL particles, TG/HDL > 1.5 (mmol/L) strongly predicts metabolic syndrome. Correlates with cardiovascular risk even when LDL-C is normal.

What the clinical evidence shows

The evidence base behind how the HodieLabs Evidence-Based Clinical Library interprets TG/HDL ratio, from randomised trials, prospective cohorts and genetic (Mendelian randomisation) studies. Full citations in the reference list below.

• Stanford insulin-resistance studies (McLaughlin et al. Annals of Internal Medicine 2003): the TG/HDL ratio identified insulin-resistant adults nearly as well as direct physiological measurement, a practical, no-cost surrogate available from any standard lipid panel.
• Copenhagen context (Nordestgaard, Circulation Research 2016): a high-TG/low-HDL pattern marks the remnant-rich, insulin-resistant lipid phenotype that carries elevated cardiovascular risk even when LDL-C looks acceptable.

Evidence-based reference ranges

The HodieLabs Evidence-Based Clinical Library interprets TG/HDL ratio against published clinical authority standards, never arbitrary "optimal" ranges. Measured in ratio:

Band	Range (ratio)
Optimal	<1.0 ratio
Borderline	1.0–1.5 ratio
High	1.6–3.0 ratio
Very high	>3.0 ratio

Clinical interpretation

• TG/HDL ratio is derived, no additional blood draw needed.
• Ratio <1.0 (mmol/L) indicates likely pattern A (large buoyant) LDL; >1.5 indicates pattern B (small dense).
• One of the most practical insulin resistance markers available from a standard lipid panel.
• TG/HDL ratio is calculated using mmol/L units. If using mg/dL, different thresholds apply.
• TG/HDL ratio is calculated using mmol/L units. If using mg/dL, different thresholds apply.

What improves it: the evidence-based levers

• Reduce refined carbohydrates and added sugars. Primary driver of elevated TG
• Increase omega-3 intake and aerobic exercise

Recommended testing frequency: Annual, as part of a comprehensive panel. Single markers are always interpreted in context.

How TG/HDL ratio testing works at HodieLabs

TG/HDL ratio is measured in every Health Blueprint at our Melbourne Preventative Health & Longevity Clinic, interpreted by a doctor against the guideline-cited ranges above and tracked over time through your HodieLabs membership.

References

1. McLaughlin T, et al. Use of metabolic markers to identify overweight individuals who are insulin resistant. Ann Intern Med. 2003;139:802–809.
2. Nordestgaard BG. Triglyceride-rich lipoproteins and atherosclerotic cardiovascular disease. Circ Res. 2016;118:547–563.

This page is general information from the HodieLabs Evidence-Based Clinical Library, not medical advice. Speak with your GP about what testing and care is appropriate for you.