The cyanide is one of the most common poisons in history and the most popularly known, but its potency is rather low because of its oral LD50 of 6 mg per kg. Here is a selection of the five deadliest poisons in the world, all of them were several hundred times more venous than cyanide: https://everydayscience.blog/the-5-deadliest-poisons-in-the-world/
The cyanide is one of the most common poisons in history and the most popularly known, but its potency is rather low because of its oral LD50 of 6 mg per kg.
Here is a selection of the five deadliest poisons in the world, all of them were several hundred times more venous than cyanide:
https://everydayscience.blog/the-5-deadliest-poisons-in-the-world/