Been using two kinds:
Mostly:
https://umzu.com/products/floracil50
And sometimes this one because the above company is sorta expensive and delivery takes a while:
Swanson L. Reuteri Probiotic Plus with L. Rhamnosus L. Acidophilus & FOS Prebiotic Digestive Support 7 Billion CFU 30 Veggie Capsules (2 Pack) https://smile.amazon.com/dp/B07RDXZD9V/ref=cm_sw_r_apan_glt_fabc_MQ1J86YN3H6QVX38PDN5?_encoding=UTF8&psc=1