Elevated TSH levels with high broccoli sprout consumption may indicate sulforaphane inhibiting thyroid hormone production.

“I think that if you have issues with your thyroid if there is hypothyroidism if you are not converting t4 to t3 if you are not making enough t4 eliminate Brassica vegetables you could be getting too much so for free”

“and the problem is those compounds that are found in Brassica vegetables are also toxic to the body now these are isothiocyanates they're also known as glucosinolates in kale cabbage broccoli cauliflower collard greens”

“and that isothiocyanates compete with iodine at the level of the thyroid”

“what about broccoli it's really not bad for us is there really evidence that the isothiocyanates like so for a faint are messing with our thyroid i sure think there is and i talk about it in this podcast”

“these are molecules like sulforaphane and goitrin which is another isothiocyanate that's very rarely talked about but i'll talk about more today so ben asks asks what are the studies of these in humans and i want to show one i think i actually mentioned this one in the book but i want to highlight this one study because people actually say is there any evidence that these actually harm the thyroid gland of humans and i think there is very good evidence that these isothiocyanates can affect the thyroid gland of humans negatively they are goitrogens”

“so so it's not and and nor are broccoli sprouts when eaten in moderation nor are glucoraph and rich supplements mature broccoli”