My little guy was spitting up so much and was super fussy. We tried Zantac and other probiotics and nothing worked so I thought I would give this a try. After 1-2 weeks he was like a totally different baby! He wasnt spitting up nearly as much and was such a happy baby. The only downside is it is super expensive but I will say it is worth it if it makes my little guy feel better when nothing else would!