Creatinine is transported through the bloodstream to the kidneys. The kidneys filter out most of the creatinine and dispose of it in the urine. Because the muscle mass in the body is relatively constant from day to day, the creatinine production normally remains essentially unchanged on a daily basis.
When you have an upset stomach, avoid acidic foods, he says. 1  Fatty Foods Fatty foods stimulate contractions in the digestive tract, which, surprisingly, can either slow down the emptying of the stomach and worsen constipation or speed up movement and worsen or lead to diarrhea.
Bananas are good for soothing your stomach with so you should eat a banana. Bananas help counteract the acid that is usually associated with an upset stomach and helps with diarrhea problems as well. Crackers are also good for you to eat when you are suffering from an upset stomach. Choose crackers that are low in sodium. Do not ingest foods like chocolates, greasy food, spicy food, and caffeinated drinks as these will only aggravate the situation.