meta_pixel
Tapesearch Logo
Log in
NutritionFacts.org Video Podcast

Can Goitrogens in Soy and Cruciferous Vegetables Interfere with Thyroid Function?

NutritionFacts.org Video Podcast

Michael Greger, M.D. FACLM

Alternative Health, Nutrition, Health & Fitness

4.8952 Ratings

🗓️ 13 October 2025

⏱️ 5 minutes

🧾️ Download transcript

Summary

What is the controversy over soy food consumption in those with subclinical hypothyroidism?

Transcript

Click on a timestamp to play from that location

0:00.0

A healthy lifestyle and preventable death?

0:10.0

What are the six lifestyle factors that collectively appear to cut the risk of dying prematurely

0:15.0

in half?

0:16.0

Not smoking, not drinking heavily, walking an hour a day, sleeping around seven hours a night,

0:21.3

not being overweight, and the sixth is the one dietary quality indicator they used,

0:26.6

eating your greens.

0:28.4

Most people don't eat enough, but is it possible to eat too many?

0:32.6

I've talked about the risk of getting too many oxalates by eating too many of certain

0:36.4

greens like spinach and Swiss chard.

0:38.9

What about low oxalate greens like kale or collards?

0:42.0

This cabbage family of vegetables has natural goyrogenic compounds that can interfere with

0:47.4

thyroid function.

0:49.2

They can compete with our thyroid's uptake of iodine.

0:53.1

But the answer is not to avoid these super healthy foods,

0:55.4

but rather to get enough iodine in our diet, as I've talked about before. There is, however,

1:01.2

an extreme threshold we don't want to cross. How much is too much? From the New England

1:06.5

Journal of Medicine, coma induced by the ingestion of raw bok choy.

1:12.3

A woman had been eating about three pounds a day, every day, which means 15 cups a day

1:17.6

is too much.

1:19.6

In the two months before she was admitted to the intensive care unit in respiratory

1:23.6

failure with a diagnosis of severe hypothyroidism, she had consumed at least a thousand

1:29.0

cups of raw bok choy.

...

Please login to see the full transcript.

Disclaimer: The podcast and artwork embedded on this page are from Michael Greger, M.D. FACLM, and are the property of its owner and not affiliated with or endorsed by Tapesearch.

Generated transcripts are the property of Michael Greger, M.D. FACLM and are distributed freely under the Fair Use doctrine. Transcripts generated by Tapesearch are not guaranteed to be accurate.

Copyright © Tapesearch 2026.