回复：Not quite so.

Iodine and Chloride belong to the same family of elements. But the iodine is much bigger. Also the iodine is actively picked up by thyroid gland instead of diffusing into it. The chance of going to other tissue is quite small compared to the thyroid tissue. 

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• Thank you both, I guess I have to go for it anyway -silverlink- ♀ (0 bytes) () 09/22/2010 postreply 19:06:48

• 回复：回复：Not quite so. -annie2- ♀ (33 bytes) () 10/16/2010 postreply 18:12:45