Leaky Gut Supplements.

I am only currently taking Sacchromyces B. For my gut health while on antibiotics. I also follow a plant heavy paleo diet. I feel like I have leaky gut. A lot of undigested food in stool and abdominal discomfort, especially right when I wake up.

What other supplements could I be taking to heal my gut while on antibiotics?

poor stomach acid and pancreatic function - often linked together - as stomach acid stimulates the production of pancreatic enzymes and could be signified by lots of undigested food in the stool.
( i have all of the above )
this is often related to 2 conditions that very often pop up in the Lyme disease patients

1, hypothyroidism ( diagnosed or otherwise ) reduces stomach acid and pancreatic function and is present in a large percentage of of chronic lyme patients to some degree ( Horowitz)

2, Bartonella ( sometimes H-Pylori ) - also reduces stomach acid production and again reduces pancreatic function also -

when stomach acid is depressed - bacteria can more easily colonize the small intestine ( SIBO ) and this does indeed cause leaky gut.

the proteins that are not digested due to lack of pancreatic enzymes may also then pass through the damaged gut lining and cause widespread immune activation and many symptoms.

i have not found any supplement to help very much with this - many of the supplements for leaky gut are things like slippery elm and psyllium etc which are in themselves good food for gut bacteria - but if you have these bacteria in the wrong place ( small intestine ) then it's just more food for them to grow and produce by-products.
most probiotics cause me flares in symptoms also
all antimicrobial for the gut - even ones that do not pass into the system very much - like berberine cause me severe herx like reactions or flares.
i have done many gut bacteria and parasite tests at all the best labs with no explanations and had gastroscopy and endoscopy done with no concrete findings - other than there is inflammation - but no root cause.

i have also done several very thorough SIBO/gut dysbiosis treatments following the best available protocols from functional medicine and lasting up to 12 weeks - only to have brief improvement - then fall back to previous levels of symptoms.

i have come to the conclusion that the most likely scenario in my case is that Bartonella is infecting my gut lining( something its well known to do (see dr Burrascano's lyme guidelines and also Dr M of galaxy writings - through this seems to be an under-publicized sign of Bart in most Lyme circles) - causing my immune system to be dysregulated and causing stomach acid reduction and pancreatic enzyme reduction and then the above chain of events

anti-bart type therapies all cause significant herx - abx and natural
symptom pattern fits Lyme and bart also

the things that have helped me most with the gut symptoms are: -
-changing diet to full ketogenic wholefood paleo ( with less than 20g of carbs per day ) and careful with fiber
( this actually improved my overall health and function more than any other single thing i have done - i notice you are already doing similar and i'm guessing you have found it useful also )
-taking 3-5x drs best betaine HCL + pepsin tablets before each meal ( betaine HCL replaces stomach acid to some degree - and the pepsin is the main protein dissolving enzyme made by the pancreas )

these are only partial treatments to improve quality of life while I treat the underlying issues of Lyme and Bart though ....that is ongoing