Since I don't have too much sleeping most nights, I decided to cut the serving size in half during this trial period. I figured this would also give me additional servings to see how the product works over time. The first time I took it, I felt a little groggy in the morning but as I continued to use it I felt that a little less, although that didn't go away completely. I feel the product works best when you take it 2-3 hours before bed, as the instructions suggest. The sleep I got while taki...Read more.