CYP1A2 is a cytochrome P450 enzyme primarily involved in metabolizing drugs (e.g., caffeine, clozapine, theophylline) and environmental toxins. A direct role in blood sugar (glucose) regulation is not well established. Some research suggests that caffeine metabolism via CYP1A2 may influence insulin sensitivity – fast metabolizers (CYP1A2*1F) might respond differently to caffeine than slow ones. However, these associations are weak and insufficient for clinical recommendations. Blood sugar control is mainly governed by insulin, glucagon, diet, exercise, and other genes (e.g., TCF7L2, GCK). A CYP1A2 genetic test alone cannot predict your diabetes risk or blood glucose levels. Do not use this gene to adjust your diet or medication. Always consult a doctor for blood sugar concerns. Evidence: mechanistic, no strong human studies.
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