

https://en.wikipedia.org/wiki/List_of_herbs_with_known_adverse_effects
The list itself says it is incomplete and I immediately thought of a couple items not listed that have known toxicity issues:
https://en.wikipedia.org/wiki/Perilla_frutescens#Traditional_medicine,_phytochemicals,_and_toxicity
When I was in high school, I was very anti-authority and swore all the time to be “against the man”. When I started working in day care I had to cut out all swearing all the time because it was too automatic to ONLY stop in front of kids. When I got a real job, I continued my no-swearing bend as a general rule because – at least until you get to know the people around you – people will treat you with more respect if you don’t sound like a foul mouthed low life.
Swearing all the time for no reason is a very low-rent affect. Letting out a rare swear will add considerable emphasis when your peers know it is not your normal behavior. Always swear when you hurt yourself. It helps.