Atherogenic Index of Plasma (AIP)

A powerful logarithmic marker for predicting cardiovascular risk

Last updated on: July 1, 2025

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What is the Atherogenic Index of Plasma (AIP)?

The Atherogenic Index of Plasma (AIP) is a logarithmically transformed ratio of Triglycerides to HDL-Cholesterol. It is a strong indicator of the atherogenic potential of plasma.

AIP correlates significantly with the size of LDL particles. A high AIP value is associated with a predominance of small, dense LDL particles, which are highly atherogenic and increase the risk of plaque formation in arteries.

Why is AIP a Powerful Marker?

  • It reflects the balance between atherogenic (risk-promoting) and anti-atherogenic (protective) lipoproteins.
  • It is a better predictor of heart disease risk than individual lipid markers, especially in patients with normal LDL-C levels.
  • A high AIP is a strong, independent risk factor for atherosclerosis and coronary heart disease.

Interpreting the Result

Low Risk (AIP < 0.11): Associated with a low risk of cardiovascular disease. Indicates larger, less atherogenic LDL particles.
Intermediate Risk (AIP 0.11 - 0.21): Indicates an intermediate level of cardiovascular risk.
High Risk (AIP > 0.21): Associated with a high risk of cardiovascular disease and a predominance of small, dense LDL particles.

Managing Your Atherogenic Risk

A high AIP indicates an unfavorable lipid profile. Improving this index involves strategies to lower triglycerides and/or raise HDL cholesterol.

  • Reduce intake of sugars and refined carbohydrates, which are major drivers of high triglycerides.
  • Increase intake of omega-3 fatty acids found in fatty fish, flaxseeds, and walnuts.
  • Engage in regular aerobic exercise, which is proven to raise HDL levels.
  • Maintain a healthy weight and limit alcohol consumption.
  • Consult your doctor for a comprehensive management plan.

This page has been medically reviewed by Dr. Khoulah Attia – PharmD, Immunology Specialist.