Eating bland foods such as bananas, rice, apple sauce and dry toast is sometimes easier, and these are easily digested and less likely to irritate the sensitive gastrointestinal system. There are many causes of stomach flu (gastroenteritis), including bacteria such as E coli, Shigella and Salmonella. Viruses can also cause stomach flu and are responsible for 30% to 40% of gastroenteritis cases in children.
Fat should comprise 20 to 35 percent of your daily calorie intake. If you eat 2,000 calories per day, your fat intake should range from approximately 44 g to 78 g of fat per day. Most of your fat intake should be in the form of unsaturated fats, such as nuts, seeds, fatty fish and avocados. Your saturated fat intake should not exceed 10 percent, or 22 g per day. Trans fat should be limited to no more than 1 percent of total fat intake, or approximately 2 g per day.
1 50 percent of your calories per day come from carbohydrates. 2  30 to 35 percent of your calories per day come from fat.  15 to 20 percent of your calories per day come from protein.