Elevated triglyceride levels are a recognized risk factor for cardiovascular disease and are often an early metabolic indicator of type 2 diabetes. Another important marker of cardiovascular risk is C-reactive protein (CRP), a globular protein that rises in response to inflammation or tissue injury.

CRP has emerged as a strong predictor of cardiovascular events and overall mortality. Research published in Clinical Chemistry (February 2008; 54(2):335–342) found that men with CRP levels greater than 3 mg/L had nearly a two-fold increase in all-cause mortality compared with those with lower levels.

Omega-3 Fatty Acids, CRP, and Lipid Markers

A study published in the American Journal of Clinical Nutrition (January 20, 2010; e-published ahead of print) examined 357 Inuit (Eskimo) participants, comparing blood levels of the omega-3 fatty acids EPA and DHA with cardiovascular risk markers.

The researchers found that:

  • Higher omega-3 fatty acid levels were inversely associated with CRP levels

  • Omega-3 levels were also inversely associated with triglycerides

  • Higher omega-3 status was associated with higher HDL (“good cholesterol”) levels

These findings suggest a relationship between omega-3 fatty acid status, inflammatory burden, and lipid metabolism.

Omega-3 Fatty Acids and Inflammatory Markers

Chronic, low-grade inflammation is increasingly recognized as a common feature underlying many chronic diseases. A study published in the Journal of Clinical Endocrinology & Metabolism (2006; 91(2):439–446) examined blood levels of polyunsaturated fatty acids and their relationship to inflammatory markers.

The researchers evaluated several well-established indicators of inflammation, including:

  • Interleukin-6 (IL-6)

  • Interleukin-1 receptor antagonist (IL-1ra)

  • Tumor necrosis factor-alpha (TNF-α)

  • C-reactive protein (CRP)

Low blood levels of alpha-linolenic acid (ALA), EPA, and DHA were associated with higher concentrations of inflammatory markers. These associations suggest that omega-3 fatty acid status may be linked with systemic inflammatory activity.

Context

Rather than acting as direct anti-inflammatory drugs, omega-3 fatty acids appear to influence inflammatory signaling pathways, lipid metabolism, and immune balance. Observational data consistently show that lower omega-3 levels are linked with higher inflammatory markers, while higher omega-3 status is associated with more favorable cardiovascular and metabolic profiles.

These findings help explain why omega-3 fatty acids are frequently studied in conditions characterized by chronic inflammation, including cardiovascular disease, metabolic dysfunction, arthritis, and asthma—without implying that inflammation has a single cause or solution.