D&D get DNA'd
This kit measures levels of smoke exposure, your metabolic status and your biological age, which could show how long you will live.
The two lads have since sent off their epigenetic data to be studied and the results are in.
Dr Dani Herrin reveals the findings and all I'm going to say is that one of them ends up being 7 years younger than the other. But which of them is it??
If you would like to have your epigenetics tested, check out the Chronomics website here.
Listen to Dr Herrin's breakdown in full by pressing the play button on screen.