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.
Step 3: Avoid Stomach Irritants If upset stomach is a regular problem for you, consider dietary and lifestyle changes. âEat regular meals and avoid food allergens and large meals,â says Egenberger. âPay attention to how you combine your foods -- fruits are best eaten on their own. Eat enough fiber to ensure regular bowel movements. And give your stomach a break between meals and in the evening.â You should also consider avoiding fatty or spicy foods, carbonated drinks, alcohol and caffeinated beverages, she adds.