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 So if youâre dealing with either diarrhea or constipation, youâll want to avoid fried foods for a while. 2  The conventional wisdom, says Krevsky, is that when you have indigestion, you should avoid fried foods because they tend to slow down the emptying of the stomach. 1  Processed Foods If youâre constipated, avoid processed foods because they lack fiber, which helps regulate bowel movements, Krevsky says.