Which food is known to contain high levels of fluoride?

Seafood is known to contain high levels of fluoride primarily due to the water in which many seafood species live. Marine environments can have fluoride concentrations that accumulate in the organisms that inhabit them. This accumulation can be significant in certain types of seafood, particularly in fish and shellfish.

In contrast, other food options like brown rice, chicken, and bananas do not typically have a high fluoride content. Brown rice can contain trace amounts of fluoride, but it is not recognized for high levels. Chicken generally has low fluoride levels, and bananas are notably low in fluoride as well, which makes seafood the best answer in this context. This reflects the relationship between marine life and their environments, highlighting how certain foods can be a more concentrated source of minerals and elements like fluoride.