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.
It all depends partially on the definition of upset stomach. For uncomplicated nausea, herbs like ginger and peppermint can be helpful. Sip on some gingerale or nibble on a ginger cookie. Some people find that putting something bland in their stomach, like soda crackers or dry toast, helps settle an upset stomach. For a *very* upset stomach with vomiting, plain, clear fluids are best. Again gingerale is a good choice, both for hydration and for fluid replacement.