I did a trial order of Intelleral. When I received the order, I noted that the main ingredient was caffeine. I tried it for the 30 days in the package and noted absolutely no effect. I would have gotten more effect if I had taken a daily can of Monster Drink. It had about the same amount of caffeine plus the benefit of B12 and a couple of other things.
I didn't stop the automatic reorder in time so had the privilege of paying an extra $60 for the privilege of trying their product. The young lady that processed my cancellation did try to sell me more but when I told her I didn't want a product that didn't work, she processed my cancellation. However, she said that since my automatic order had already shipped, I would be charged for that shipment at the regular price.
In my opinion, don't waste your money on a product that doesn't work or if you do, cancel the automatic order as soon as you receive the trial shipment.
Bottom Line: No, I would not recommend this to a friend