We choose Evivo after using a mass marketed probiotic drops for our baby that offered no results. We also found out that these drops contained heavy metals in them. I saw a Facebook ad for Evivo and decided to try them. Changing formulas, plus adding Evivo has been life changing for our (then) 1 month old. He is not fussy, has no gas, and is a much happier baby! We are SO happy with Evivo! I encourage people to look at what they’re giving their babies and know that all probiotics are not created equal. Evivo is worth every penny!