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.
One of the most important vitamins you lose is vitamin B. Lack of it produces stomach ache and nausea, which is why it is very important to compensate for it. Eat a ripe banana. Bananas are a rich source of vitamin B and they are generally a good remedy for an upset stomach.