wombat
From the "rebuttal" link below...
"This seaweed-induced goiter eventually disappeared.22 Suzuki et al25 questioned whether seaweed itself was the cause of this goiter, since much larger amounts of
Iodide in pulmonary patients did not induce goiter. Suzuki et al commented: "Considering the paucity of reported cases of
Iodine goiter with the wide spread usage of
Iodine medication, we cannot exclude factors other than excessive intake of dietary
Iodine as a cause of the goiter." Also, residents in Tokyo, Japan, who excreted similar levels of
Iodide in their urine (around 20 mg/24h) did not experience goiter. Contamination of seaweed with bromide is the most likely explanation, since bromide is a goitrogen,3 and there is 1400 times more bromide than
Iodide in seawater.17 The presence of excess goitrogens in the diet would require greater amounts of ingested iodine to prevent the goitrogenic effect of these substances.11,18"
and...
The requirement for iodine depends on the goitrogen load. The greater the goitrogen load, the greater the need for iodine. Bromide is a goitrogen that interferes with the uptake and utilization of iodide by target cells.
and...
//www.curezone.org/forums/fm.asp?i=829381#i
bromine needed
and...
//www.curezone.org/forums/fm.asp?i=826453#i
Goitrogens
I, personally, think that the iodine contained in kelp is useful. For those who haven taken it as a staple of their diets, anyway. I don't think that it is useful for those of us that exhibit symptoms of long-term iodine deprivation. Gotta displace chlorines & bromides with relatively large doses of pure iodine for that(Lugol's).
Proper balance must be acheived... :)