The idea behind Intelleral is that it will provide you with stimulation that will increase focus and attention without the negative side effects that come from coffee, energy drinks or similar common products, or from prescription medications. Its primary ingredient appears to be green (unroasted) coffee beans, and it comes processed into capsules.
Intelleral does not give much to stake one’s hopes on. Between a very high price, a formula that only mentions a single ingredient (and that one widely available elsewhere), and no real information on their cited single clinical study, you can likely get more for your memory-supplement money in many other places — and if you do want a product featuring green coffee bean extracts, you can get them directly for much cheaper.