Evivo is amazing! My preemie twins struggled from day 1 to digest my breast milk and the NICU recommended formula supplements. They were born via c-section and would writhe in pain every time they had a bowel movement. The on call pediatrician at the hospital hadn't connected their bowel movements to their pain (not had we) and prescribed meds for acid reflux. After leaving the hospital we decided to quit all MEDS and formula and exclusively feed breast milk. This helped some, but we still saw them writhe in pain with each BM. After trying evivo for about a week, their pain subsided and we could see a major difference in their bowel function. Our now 4 month old twins are so much better now. This is the #1 thing I recommend to my mom friends.