An annual blood test with analysis of methylation sites from key epigenetic aging clocks (e.g. Horvath). Epigenetic aging clocks have already been shown to reliably predict age, time-to-death, all cause mortality, cog. function, immune function, CV disease, cancer, and more. They may also become a key tool to demonstrate the reversibility of disease risk through dietary and therapeutic regimens, as epigenetic states are thought to be reversible, and this is why annual monitoring is critical.