How are CYP1A2 and longevity related?

The provided context does not contain any direct information linking CYP1A2 to longevity. CYP1A2 is primarily involved in caffeine and drug metabolism. Some studies suggest that certain CYP1A2 variants may modulate the risk of cardiovascular disease or cancer, which could indirectly affect lifespan. However, the evidence is mostly mechanistic or based on observational studies, not robust clinical trials. Effect sizes are small and heavily influenced by lifestyle factors such as coffee consumption and smoking. Direct claims about longevity are speculative. Consumer DNA tests that imply such links should be viewed with caution. Without clinical validation and a comprehensive assessment of genetic and environmental interactions, individual predictions are not reliable.