Yes, there are fruits that contain a higher relative dose of radiation than a banana. Bananas are known for their relatively high levels of potassium, including a naturally occurring radioactive isotope called potassium-40 (K-40). However, the radiation dose from consuming a banana is extremely small and not harmful to humans.

Brazil nuts are another example of a food that contains a higher relative dose of radiation. They have high levels of radium, a radioactive element, due to the deep root systems of the trees they grow on. The radiation levels in Brazil nuts can be up to 1,000 times higher than those found in other foods, including bananas. However, similar to bananas, the amount of radiation in Brazil nuts is still quite small and does not pose a health risk when consumed in moderation.

It's important to note that the natural radioactivity found in fruits and other foods does not typically pose any significant health risks, as the levels are generally too low to cause harm.
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