1) means alco kills kanker
2) NAD+ is oxidising agent which means alco functions as antioxidant = good
3) Extremely high levels of serotonin can cause a condition known as serotonin syndrome, with toxic and potentially fatal effects. In practice, such toxic levels are essentially impossible to reach through an overdose of a single antidepressant drug, but require a combination of serotonergic agents, such as an SSRI with a MAOI, which may occur in therapeutic doses.
4) slanderous lies and insinuations