(alcohol, drugs, any substance that could indicate mental illness, etc.). An example of such a substance in regard to mental illness might be high levels of blood calcium. I would hope there are many others.
Answers (1)
Back in 2007 a blood test to diagnose schizophrenia was developed and later, one was developed for bipolar. Hoever there are some ethical reasons for not using them and reason why they have not been globally accepted.
If you want to click on the link below, remove the space between // and motherboard.
https:// motherboard.vice.com/en_us/article/ezpn3m/blood-test-for-bipolar-disorder