Title can be improved. What is toxicity? "A central concept of toxicology is that effects are dose-dependent; even water can lead to water intoxication when ta

Title can be improved. What is toxicity? "A central concept of toxicology is that effects are dose-dependent; even water can lead to water intoxication when taken in too many doses, whereas for even a very toxic substance such as snake venom there is a dose below which there is no detectable toxic effect. Toxicity is species-specific, lending cross-species analysis problematic. Newer paradigms and metrics are evolving to bypass animal-testing, while maintaining the concept of toxicity endpoints." http://en.wikipedia.org/wiki/Toxicity http://en.wikipedia.org/wiki/Toxicity