Took my first two doses (3 caps each) offrom DS. The label says it kicks in within 15 minutes. I was like "Yeah Right"! Its no joke! stuff kicked in within 15 minutes, warmed me up right away. I had to actually shed layers of clothing i was so hot. Energy was nice. No jitters, just clean rush. Like you are on a mission. There was no sharp let down either. Stuff gets my approval. I need to get a bottle now! I am going to dose it the next 2 days at 6 caps per day and then get back on the . Hopefully my bottle arrives so i can start the adrenalean when the LR runs out!