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.
An upset stomach is a feeling of nausea or indigestion that can come from many sources. You can have an upset stomach because of something you ate, stress, motion sickness, or from some illness such as the flu. One of the most common causes of upset stomach comes from eating or drinking too much and being full.