I was skeptical at first but I noticed results shortly after I started using it. After a couple of days I felt better, more positive, so it does improve your mood. I feel like it gives me a better edge when I communicate with others and it has given me clarity and improved my focus. I played with dosage levels until I found the one that works which is 15 drops. I am 6'0" and 210lbs, dosage depends on body weight. The results don't occur immediately and you don't notice them right away, but I noticed a difference on day 2 increasing more every day over the next week or so. Proven results, highly recommend.