What's the difference between prebiotics and probiotics?

Probiotics are live bacteria. Prebiotics are the fibers that feed them. Most formulas include one or the other. LYMA ID² includes both - 8.5g of multi-length prebiotic fibers to nourish all four sections of the colon, plus 3 billion CFU of ActiBio® spore-forming probiotics designed to survive stomach acid and reach the gut alive.

This matters because a probiotic without the right prebiotic fuel is like planting seeds in concrete.