I recently had mine done, and in terms of mental health, the results were quite surprising. There are certain genes that predispose me to depression, but only if exposed to childhood trauma (which I was). I also learned through these results that I am unlikely to respond to certain antidepressants like citalopram/escitalopram, and are more likely to respond to paroxetine. Perhaps the most disturbing thing I discovered is that I have an EXTREMELY high level of a thing called 'multi-drug resistance protein' which basically means most drugs are flushed out by my body before they can affect me. This explains quite a lot, because most antidepressants i've been on have never really helped me, the exception being Fluoxetine and Mirtazapine (which are not affected by this protein). Also, I've taken certain psychoactive substances in the past, but I never felt high off them, and couldn't understand how people could get addicted to them.