Which of these compounds is not toxic?

Niacin causes red and itchy skin when taken as a supplement. It is used to "flush" your system of toxins. (and THC)

Isn’t botulinum toxin better known by its short form :Botox?. And people have this as a beauty treatment!!

swish, botox was originally used for medical not cosmetic reasons. It is used for migraines and in my case, to treat violent cluster headaches after being rear ended in a car accident

rinnypink, Many things can be very toxic & lethal if too much is taken. Simple example: Nutmeg. Not an irresponsible question at all, it all depends on your own personal interpretation, just like anything else.

too cool!