What to watch with TSH and Blutzucker?

When monitoring TSH and blood glucose together, watch for interactions. Hypothyroidism (high TSH) can reduce insulin sensitivity, potentially raising blood sugar. Hyperthyroidism (low TSH) can increase glucose metabolism, possibly lowering blood sugar. Medications like metformin or levothyroxine can also affect both. Evidence is based on clinical observation and mechanistic understanding, not large trials. Effects are moderate but clinically relevant. Important: abnormal values require medical evaluation, especially if both are off. Home tests can screen but not diagnose. Genetic variants (e.g., SIRT1) have small effects; lifestyle and diet dominate.