Either these vitamins are as good as First Day claims, or it is a massive coincidence: From the first day my 9 year old has been taking them, she has consistently been less hangry/explosive, and when she did have an explosive reaction to something, it took her less time to calm down. There has been no other change in our routine, so I can only conclude that it is the vitamins! I've never noticed this change in behavior with other multivitamins I got from the grocery store, which often have over 100% of the daily recommendation and two dozen different vitamins. I'm so happy I found First Day!