To ask you about probiotics?

[jamoncrumpets]

My insides are ragged from antibiotics and stress. What's the best and most potent probiotic you've used?

Shamelessly posting here for traffic.

Kimchi and kafir

If you have antibiotic related diarrhea right now I'd say Saccharomyces boulardii. Make sure you find a product where the yeast cells are microencapsulated or they won't get through the low pH in the stomach.
Long term the best approach is a varied diet with lots of fermented foods and different fibres, both soluble and insoluble.