I started digestive enzymes, mastic gum during and after treatment and barleans stomach repair powder (has glutamine, DGL and so many other stomach herbs) . Of course I also took probiotics ( a combo of soil based and high dosage) as well to repair gut. I’ll attach links to the ones I took. I worked in a natural food store for years so I have my personal preference for brands.

https://www.amazon.com/Barleans-Stomach-Repair-Vanilla-Ounce/dp/B01N127BKO

Probiotics for Women and Men - Garden of Life Raw Probiotics Ultimate Care 100 Billion CFU Probiotic Supplement, Daily Probiotic for Adults with Digestive Enzymes, 30 Capsules https://www.amazon.com/dp/B07CZFZTCW/ref=cm_sw_r_awdo_navT_a_VFNDSFCHH6C63YH5GYBS

https://www.amazon.com/Garden-Life-Probiotics-Acidophilus-Probiotic/dp/B00AR0FREW

https://www.amazon.com/Enzymedica-Supplement-Digestive-capsules-servings/dp/B001W44AV8

Now Foods Supplements, Saccharomyces Boulardii, 5 Billion CFU Probiotic, 120 Veg Capsules https://www.amazon.com/dp/B07YBKYPSX/ref=cm_sw_r_awdo_navT_a_AYTT2A4GW60KXCG7W16C

https://www.amazon.com/Supplements-Saccharomyces-Boulardii-Probiotic-Capsules/dp/B07YBKYPSX/ref=sr_1_7

https://www.amazon.com/Natures-Way-Primadophilus-Reuteri-Packaging/dp/B000O3GCSW/ref=sr_1_2

https://www.bioprimesupplements.com/index.php?route=product/product&product_id=53

https://www.amazon.com/Nutricost-L-Glutamine-Powder-KG-Glutamine/dp/B01EVOOBIW/ref=sxts_rp_s1_0