We initially tried probiotics because my daughter was born by cesarean section and on IV antibiotics for the first two days of her life... and we really didn’t notice any difference in her with other brands of probiotics. Although breastfed babies do stool more often, I felt having 12 watery stools per day and being extremely fussy with gas was not normal... 3 days after starting Evivo, which was a different strain of probiotic, we noticed a HUGE difference in her gas pain/fussiness and she now only stools about 2-4 times per day. Happy baby, happy life! Great product.