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.
First, thereâs the well-known BRAT diet â bananas, rice, applesauce, toast. Bananas are excellent for upset stomachs, not only because theyâre bland semi-solids that are easier to digest than many fruits, but also because they have a boatload of potassium, an electrolyte quickly lost through vomiting and diarrhea.