I said compromise health to some extent, this could be even in small ways. I wasn't considering death as a "compromise to health".

Just take a look at any fundamental neuroscience/brain biology textbook. I would guess that most likely continued microdosing would lead to downregulation and added stress on the pre and post synaptic neurons. Does this mean death? Probably not. Does it have long term effects? I'm not sure, I haven't read the research literature.