Can Omega-3 Index help with Blutzucker?

The Omega-3 Index (percentage of EPA and DHA in red blood cell membranes) is a biomarker for omega-3 status. Some observational and interventional studies suggest that a higher Omega-3 Index is associated with improved insulin sensitivity and lower fasting blood glucose. However, the evidence is mixed: meta-analyses show modest positive effects on glycemic parameters in type 2 diabetes, but overall clinical effects are small to moderate. The Omega-3 Index is influenced by diet and genetics (e.g., FADS1 variants). A low index may indicate suboptimal intake, but raising it does not guarantee blood sugar improvement. The evidence level is 'human-moderate' – mechanistic and epidemiological support exists, but strong RCT evidence for direct glucose lowering is lacking. Caveat: Not a substitute for established diabetes management (diet, exercise, medication).