Dear Sir.
Thanks for your answer.
I understand your comments.
But still have curious question.
we could feel bad symptoms and die, but eat below LD50 or little amount, we could not feel symptoms or we are safe>
1. how long it will take for toxicant get into cell or neurons and make cell function stop and die..
2. if one mercury could make die one neuron and cell --> that means small amount of mercury could make die only a few neurons and cells --> so it is not so major event for human because we have a lot of neurons and cells and it could be regerated...
3. if mercury get into neuron or cells and do bad effect... how could mercury be detoxified or excreted..
4. why small amount is OK? --> in my point of view, mercury is very hard to be detoxified,,,,so it must kill one neuron or cell... is there any mechanizm to fight with mercury in neuron or cells
5. (very curious) small amount of mercury toxicant--> we could not know symptom? --> that means there is no mercury in cell or neuron? or small amount of cell death or malfunctions people cannot feel?

Sorry to ask alot of questions. Thank you very much.