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.
The majority of your fluid intake should be water, followed by clear broths and juices, except pear, apple and grape juice -- which can all cause additional stomach upset. Step 2. Don't eat foods that are high in dietary fiber. A diet that is high in fiber is usually healthy, but if your stomach is upset, fiber can make diarrhea and bloating worse.