Imagine an amount of poison the size of an ordinary pea:

Poison
Now imagine that such a crumb eliminates a person within a few minutes. To be precise, a lethal dose is about 0.1 grams, i.e., a glass of such a substance can send 2000 people to their forefathers!
If you think that I am talking about
"Novichok" now, you are mistaken. In fact, we are talking about the famous
"spy" poison - potassium cyanide.
This is what we will take as a reference point, so that it will be approximately clear what doses we will be talking about.
So, we all remember these detective films in which an enemy agent, in order not to be captured, bites the collar of his own raincoat with an ampoule of potassium cyanide sewn into it.
Death occurs very quickly and such scenes are not devoid of realism, because the maximum dose of cyanide for a person (0.1 grams) looks like this:
Comment: See also: