Roasting brazil nuts may slightly reduce the selenium content, but it does not completely destroy it. Selenium is a trace mineral that is naturally present in brazil nuts, and it is important for various bodily functions, including immune system function and thyroid health.
Research has shown that the selenium content of brazil nuts can vary greatly depending on factors such as the soil where the trees are grown, the climate, and other environmental factors. Roasting brazil nuts can slightly reduce their selenium content, but it is unlikely to significantly impact the overall nutritional value of the nuts.
To maximize the nutritional benefits of brazil nuts, it is recommended to consume them raw or lightly roasted. Raw brazil nuts can be soaked in water overnight and then dehydrated at a low temperature to improve their digestibility and nutrient absorption.