I saw results in my hyperactive 6 year-old boy after 24 hours, which I did not expect at all. It's like the wonderful child inside finally broke out of the frenetic, out-of-control exterior he was locked in. The last four days have been the best days of our lives together (that truly is not an exaggeration). The taste isn't bad, it's the consistency that's odd (it is, after all, oil). It's tolerable, but we're going to start mixing it with yogurt. Apparently it doesn't work for everyone, but it's worth a try.