How are HDL and blood sugar related?

HDL cholesterol and blood sugar are inversely related through insulin resistance. Low HDL is a well-established marker for metabolic syndrome and type 2 diabetes, while hyperglycemia can impair HDL function (e.g., reverse cholesterol transport). The relationship is supported by large epidemiological studies (human-moderate evidence), but it is not purely causal – both are influenced by shared factors like obesity, physical activity, and genetics. Variants in PPARA (rs4253778) show small GWAS associations with HDL but do not determine blood sugar levels. Clinical thresholds: HDL <40 mg/dL (men) or <50 mg/dL (women) increases cardiovascular risk, especially with elevated fasting glucose. Consumer DNA tests cannot predict individual blood sugar or HDL trajectories; they only highlight minor genetic tendencies. For actionable insights, combine genetic data with lab tests (fasting glucose, HbA1c, lipid panel) and lifestyle modifications.