I typically take this at night and it helps me fall asleep and provides mental clarity. Upon initially taking it, I passed out and slept the entire day. So I definitely would recommend taking in the evening.
The only negative comment is regarding the seal on the bottles. They sometimes leak in transit. Also, they're glass and it would be great if they were packaged better. Otherwise, we have been happy with this supplement. It helps my son keep calm in a natural way, rather than relying on pharmaceutical intervention.