Digestion transit time. How long should it take.

I was looking into this hardcore about a year ago due to some major digestive agony about one hour after eating - I wanted to know where exactly the food was at that point, since the digestive organs overlap so much. I eventually saw GI specialists as well, and they concurred with the internet consensus that it depends entirely on what you eat and the shape that your gut is in. (I know, not helpful at all.) I think that "normal" times based on a standard American diet are not a healthy goal. If you excrete food that doesn't seem to have been digested fully, then that's not a great sign, but otherwise I'd say that relatively fast processing is a good sign. For me, if I don't eliminate completely every morning, then I feel like utter garbage. I eat heaps of vegetables all day.

I look forward to reading what others have to say.

To measure I will swallow something insoluble such as a cooked beet root skin or an uncooked dried black eyed pea. This acts as a stool marker. I have also used it to gauge stomach acid levels based on the blackened chemical burns on the outer skin.
They were times in the past where I was passing entire capsules I'm supplements unbroken.

are you having also loose frequent stools?

if so it defo sounds like something is upsetting your digestion

low stomach acid is one thing I would be keen to rule out -
also, pancreatic function can be upset and the two tend to be linked - and mean your food is not digested properly - this undigested food itself can upset the system further becuase proteins in food that would normally be broken down are not, and therefore remain antigenic and trigger immune reaction

low stomach acid also fails to kill normal bacteria in our food and that can make your gut super reactive - its v common with any chronic illness.
I think H-Pylori and Bart both suppress it - so it can be infection driven.
low thyroid function also causes this - so if you have had or still have thyroid issues( v common with lyme) that raises the probability of this significantly
acid reflux can also be a sign of low stomach acid - so again

there are useful gut test panels - like Comprehensive stool analysis with parasitology that will check for things like pancreatic function, protein digestion, fat digestion, starch digestion, inflammation, abnormal gut flora and parasites

functional medicine people like Chris Kresser - also have a lot of sound free material on improving gut health