Soy and Thyroid Disease

Item on Hoy Gising! on cable TV today, Health Tip: Avoid thyroid disease by limiting consumption of soy.
Presumably, the isoflavones (the active ingredient that makes soy so popular today) blocks production of thyroid hormones.
This reminds me of my presentation at the Mactan Doctor's Hospital Community Medicine Annual Convention two years ago. Of all things, I was tasked to talk on the status of the coastal environment in and around Mactan Island. For me, it was truly a lucky occasion since the Directors of all six Community Medicine Training Programs in Metro Cebu were there. I pounced on the opportunity of challenging the Directors in doing a joint study to support my hypothesis that the main cause of goiter in our area is the indiscriminate use of cyanide (koskos) in fishing. Koskos has long been the preferred method of catching fish especially in the aquarium fish trade. And, we have been squirting cyanide into our coral reefs since 1960.
Cyanide is non-biodegradable and continues to accumulate in the environment. IT IS THE STRONGEST THYROID HORMONE BLOCKER KNOWN TO MAN. With chronic low dose cyanide poisoning, the body continues to send messages to the thyroid gland about there being no hormone reaching the endorgans, so therefore the thyroid activity goes into high gear, creating the typical goiter. Goiter is so prevalent now, that thyroidectomy is the #1 general surgical procedure that we do during our medical missions.
Has the medical community done anything about this. None, so far. What about the government? None, so far. If we spent our efforts on passing the ASIN law into stopping Koskos, it would have served us...and the environment better. Koskos remains the #1 killer of our coral reefs to this day.