How do you know if you need digestive aids?

What are some of the symptoms for needing digestive aids for pancreatic enzyme food breakdown , bile salt creation , stomachs acid , absorption etc.

I don't know how to read stool to know if im breaking down carbs protein fats and if I'm absorbing it or just passing it through .
Thanks .

Here are some of the things others may be taking:

Bone broth
Aloe
Slipper elm
HCl acid
Vinegar
Papayan
Ox bile
Dandelion
Digestive enzymes
Gentian bitters