I can’t testify to the long term results (we discontinued after 3 days), but my 10 week old son did not seem to adjust well to the probiotic. I was SO excited to try this out and I still am a big fan of the company overall. My son just HATED the taste of it. No matter what we did he would spit it out. It really had quite the smell to it as well. I ordered a 3 month supply because it was cheaper that way. So it’s not like I had a bad batch, because I tried a satchel from 3 different boxes and they all smelled bad and he wouldn’t take it down. It also made him backed up for 3 days. He finally got a giant poop out today, but he was even more fussy before he went. I’m really disappointed he happened to be one of the babies that didn’t take well to it.