This has been my experience with it as well. It appears to regulate the spike of caffeine from coffee. I recall reading it had to do with an enzyme that helped

This has been my experience with it as well. It appears to regulate the spike of caffeine from coffee. I recall reading it had to do with an enzyme that helped the body process caffeine so it attentuates the effect of the stimulant. Whether that's true, I often take one with coffee. I've also experienced similar effects chasing my morning coffee with green tea.