Since starting to take this, I've been sleeping so well. Even though it is not a "sleep" supplement in the way that melatonin (which has never worked for me) and other products are, I think it may be working in that way because it is bringing the adrenal hormone into a better balance with my other hormones.I'm very much in agreement with the doctors, like Amy Myers and Prudence Hall, to name two, who believe that hormone balance is one of the most important keys to better health. I also believe that adrenal function is very often overlooked.The only way to know about your adrenal function, beyond how you feel, is to get a blood work panel that includes it. I had that done several years ago and my adrenal function was low. My doctor gave me supplements to remediate it and once all of my hormones were back in balance, including the adrenals, I felt and slept so much better. My experience with sleep is similar since taking this, so I'm really glad I found it.The product description lists those who would benefit from taking this and caffeine-drinkers are in the group. As someone who loves my morning cups of coffee, it's possible that this supplement really is offsetting that and is the reason for better sleep.It is expensive though, so that's a consideration. There are other supplements that contribute to better adrenal function that are not nearly as costly. But for now, this is working for me. Since I struggle a lot with sleep, getting the luxury of a solid night is worth it.