How many hours after eating a certain food would you know if is a safe or unsafe food? I read that it takes 6-8 hours to pass the small intestine and up to 24-40 hours to pass the large. So say I eat pretzels at 6 p.m., when would I know this is a safe food for me? I am tracking everything I eat and making a safe list. Thank you all so much. maryann
Content on HealthUnlocked does not replace the relationship between you and doctors or other healthcare professionals nor the advice you receive from them.