Probiotics are living microorganisms that scientific research has shown to benefit human health. Most commonly these are bacteria, but they may also be yeasts. In some cases they are similar to, or the same as, the microbes already found in a healthy digestive tract. Many probiotics were originally isolated from common fermented foods such as yogurt. Mommy’s Bliss Baby Probiotic Drops contain the live culture Lactobacilus rhamnosus GG, the most widely studied probiotic in the world with over 800 scientific publications attesting to the safety and healthfulness of these beneficial bacteria. Like all dietary supplements you should discuss the use of probiotics with your baby’s doctor.