To start, I would highly recommend this product to anyone searching for a great, quality, cognitive supporter/enhancer. I take this supplement in the morning, and I actually only take half the recommended dose (2 capsules instead of 4). I do this solely because i also love to drink coffee in the mornings and for me personally, do not want to consume a large amount of caffeine. I notice the effects of this supplement kick in roughly an hour after ingesting. It does not cause shakes or tremors ...Read more.