I usualy get digestive enzymes and maybe some Betain hcl.
This is a great subject I haven't seen much of since the worste I have ever felt for a long period of time was due to my digestion being screwed up. I believe it was due to antibiotics but was never 100% sure. I do know I would have traded the illness I had before the antibiotics for the digestive problems if given the choice.
I take some digestive enzymes as well, most of which are in other supps I take such as greens, my protein, and my multi. I also have started adding fiber (Metamucil) it is cheap and easy to do and actually can help change up the flavors of my shakes I use the orange and the berry. The extra fiber seems to have been the most noticable change in my digestive health.
I have read that HCL can make a big difference as well but was not sure if it was mostly hype.
Do you see a noticable difference from taking the Betain HCL?
Is there a brand you prefer?
bromelain was also mentioned which I don't know much about. Is there any brand that anyone prefers?