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.
Bland, gentle food. When you feel you might be able to hold down food, eat foods that are gentle on your stomach and gastrointestinal tract. Stick to bland, low-fat, low-fiber foods. Fat is harder for your stomach to digest, especially when itâs upset. Avoid fatty foods to prevent upsetting it further.