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.
1 Eat small meals throughout the day, or snack on things to keep your stomach from being upset. 2  Avoid overeating, though, and stop when you are full. 3  Avoid spicy or greasy and processed foods such as chips, fried foods, doughnuts, pizza etc. 4  These types of food can make the nausea worse.