Designed with tolerance and baby's comfort in mind, Good Start | Dr. Brown's Soothe Pro Infant Formula provides complete nutrition for sensitive tummies and help address common feeding issues including gas, fussiness, and spit-up. Good Start | Dr. Brown's Soothe Pro is the only formula to incorporate the probiotic L. reuteri. Soothe Pro is clinically tested and shown to reduce fussiness with the first bottle, as reported in study results among parents of fussy infants. This baby formula provides easy-to-digest, complete nutrition for little ones who may be experiencing tolerance issues. Good Start | Dr. Brown's Soothe Pro is made with 100% whey protein which is free from curdling that can be caused by casein protein. Soothe Pro is made with an advanced 2-step hydrolysis process that makes small proteins that are easy to digest. This infant formula is made with 2'-FL HMO, human milk oligosaccharide not from human milk. This baby formula is non-GMO, ingredients not genetically engineered. Soothe Pro has no artificial growth hormones. No significant difference has been shown between milk derived from rbST-treated and non-rbST-treated cows.