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.
Chocolate, caffeine and alcohol all cause the same problem. Also avoid foods that pack a lot of heat as well as cheeses and heavy meats (think nachos or beef chili, for example): These high-fat foods can take longer to digest and can irritate the lining of your stomach. For heartburn-free flavor, Koff recommends basil, cardamom, turmeric, cinnamon and rosemary.