A technical walkthrough of DNA methylation testing: array versus bisulfite sequencing versus nanopore, the IDAT-to-beta-value pipeline we would run, which epigenetic clocks are worth computing, and where the measurement stops being informative.
A technical answer to which genetic sites are worth uploading raw DNA to, what the array file contains, and how to run the same analyses yourself with plink, bcftools, and an imputation server.
What biological age tests measure, which clocks are worth running, how to compute them yourself from IDATs and a blood panel, and how much of the number is noise.