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 Foods Like Rice, Potatoes & Toast. If your stomach hurts because you have a virus or have been going to the toilet, eating bland and starchy foods such as rice, potatoes and toast can really help. These types of foods don't put any added stress onto your digestive system if itâs feeling a little sensitive.