Evidence check: HDL in the context of Blutzucker

The relationship between HDL cholesterol and blood glucose is complex and mediated by insulin resistance. Epidemiological evidence consistently shows that low HDL is associated with higher fasting glucose, impaired glucose tolerance, and increased risk of type 2 diabetes. However, HDL is not directly causal for glucose regulation; low HDL often reflects underlying metabolic dysfunction such as insulin resistance, visceral obesity, or inflammation. Genetic studies (e.g., CETP variants) indicate that isolated HDL elevations do not necessarily improve glucose metabolism. Therefore, HDL alone is a limited biomarker for blood sugar control. Clinically, the full lipid profile (HDL, triglycerides, LDL) combined with fasting glucose and HbA1c is more informative. Lifestyle interventions like exercise, Mediterranean diet, and weight loss improve both HDL and blood glucose, but effects are modest. Caveat: direct-to-consumer tests highlighting single HDL SNPs often overstate clinical relevance. Evidence: human-strong for association, mechanistic for causality.