ELI5; Why are some foods considered “good” to eat when sick?

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Given the standard american diet, how would one come to the conclusion that a vegetarian diet or something would be worse for a sick person, instead of the staple sick food diet, BRAT diet – bananas, rice, apples and toast among many other foods, I really want to know what makes these food good to eat when sick? is there some type of specific nutrients in these foods that is essential to our bodies? I fail to understand the importants of the “BRAT” or any other diet designed for sick people IE. covid and the flu. Thank You!

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Anonymous 0 Comments

When you are sick you tend to have a hard time eating, or at least keep down your food. So there is a real danger of you getting malnourished. This is bad as the body will prioritize energy to your more vital functions over your immune system. So you will take longer to heal. I have not heard the exact list of food items you listed but they are all examples of very energy dense food as it contains mostly sugar and water. And this is what is recommended you prioritize when sick. However if you are able to eat full meals then you should do this instead.

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