Quote:
Originally Posted by kiara7 
Less poison vs more poison. Ok...
How about no poison? Did that ever cross anyone's mind? 
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Ever hear of Nitric oxide - nasty lethal gas at small concentrations, but absolutely essential for human life in teensy quantities. Men can't get erections without it, lungs can't function without it ... the research is just starting, but it's already an incredibly important molecule.
Ever hear of oxygen? It's harmless, even essential at some levels, toxic at higher levels. At one time, premature babies were placed in incubators containing O2-rich air, but this practice was discontinued after some babies were blinded by it.
By your standards and logic, because oxygen can cause blindness and convulsions at one concentration, or because NO is deadly at some concentrations, they're bad at any concentration and we should avoid them.
The concept that "the dose makes the poison" goes back into historical medicine, way before "Big Pharma". Paracelsus the 16th century genius wrote:
Alle Ding sind Gift, und nichts ohn Gift; allein die Dosis macht, daß ein Ding kein Gift ist. "All things are poison and nothing is without poison,
only the dose permits something not to be poisonous."
That is to say, substances often considered toxic can be benign or beneficial in small doses, and conversely an ordinarily benign substance can be deadly if over-consumed. Even water can be deadly if overconsumed[7].