12. Bok Choy
Bok choy is a type of Chinese cabbage.
It has thick, dark-green leaves that make a great addition to soups and stir-fries.
Bok choy contains the mineral selenium, which plays an important role in cognitive function, immunity and cancer prevention (36Trusted Source).
In addition, selenium is important for proper thyroid gland function. This gland is located in your neck and releases hormones that play a key role in metabolism (37Trusted Source).
An observational study associated low levels of selenium with thyroid conditions such as hypothyroidism, autoimmune thyroiditis and enlarged thyroid (38Trusted Source).