Probiotics - You can get this from whole foods.
http://www.naturesway.com/Products/Probiotics/15784-Primadophilus-Optima-Max-Potency.aspx
How to take it:
Break open the capsule - and put it in your yogurt.
How it helps:
Chemo kills everything in the gut. You need to keep up the good flora in the gut so none of the bad flora starts to grow