Can COMT help with blood sugar?

COMT (catechol-O-methyltransferase) degrades catecholamines like adrenaline and dopamine. Since catecholamines can inhibit insulin secretion and promote hepatic glucose production, a theoretical link to blood sugar exists. However, robust evidence that common COMT variants (e.g., Val158Met) directly and meaningfully alter blood glucose in healthy individuals is lacking. Most research focuses on polygenic risk scores for type 2 diabetes or genes with stronger metabolic roles (e.g., TCF7L2, PPARG). Direct-to-consumer DNA tests often overstate the effect size of COMT on blood sugar. The clinical utility is unclear; lifestyle factors remain far more influential. Caveat: Do not base supplementation or dietary changes solely on COMT results.