The average for a person without intestinal problems of any kind is a range from 18 to 36 hours.
The pill cam [capsule endoscopy] showed that I had an abnormally rapid transit time. The pill cam came out 6 hrs and 52 minutes after I swallowed it. So it is entirely possible that what you saw last night was from your evening meal. The GI that administered my pill cam was commenting on my rapid transit time and my various vitamin deficiencies. He said the rapid transit time does not allow for proper absorption of nutrients.
The fastest that the GI center had ever seen a pill cam go from mouth to "out" was 2 hours and 3 minutes.
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