For something so small it sure has an amazing effect ...this can do wonders to the brain...I was involved in a motorcycle accident that at the time claimed my life...im Lucky to be here and this is truly a blessing in disguise I recommend it to anyone and im not done yet....this is my 2nd week of this and I noticed a big difference so far....so happy I found this and many thanks to SC for this opportunity to get it and their other stuff is fantastic also happy shopping you have come to right place and will not be let down Close