This may just be paranoia thrown in with curiosity talking but I eat a lot of meat and butter (which are known to have high contents of AGEs and especially more so when heated), and seeing as how AGEs are responsible for oxidation and inflammation, I think it would be really useful to know the levels in our body.
I've looked around and found some test called a skin autofluorescence reader but that doesn't sound like a test an everyday patient could take.