What is normal food transfer time?

33-53 hours : Depends who do you believe. Two major studies One American and the other British were performed. The first said 53 hours from ingestion to elimination and the cousins across the pond said 33. Of course it takes fatty food longer to get digested and processed through the gut. Also chronic disease such as diabetes and others significantly slow gastric emptying called gastroparesis.

Variable but...: ...figure 4-6 hours for stomach emptying, 6-17 hours for small bowel transit, and 1-3 days to traverse the colon. That translates into a normal bowel frequency range between 3-4 bowel movements daily and one every 3-4 days. Food composition, volume, drugs, exercise, infection, co-morbidities all play a role in speeding up or slowing down the gut.