Whatever you or anyone does...Do not buy this crap. I bought 4 bottles, used one up, NOTHING. Still having a issue. I believed what the web sight said about how it works for ringing in the ears. NOT. I am out $200.00 hundred and can not get any refund what so ever. I can not take it because of my meds and something in the what it is made with. So , anyway, OUT THE MONEY. I am very sad about this SCAM. I am a 70 year old lady, I did not have the money in the first place. But, the ringing in my ears is enough to make a person crazy. Looking for a fix was what I thought I would get from Cortexi. Hay lesson learned, read the reviews before I EVER do something like this again. Cortexi Crap, you should be ASHAMED, scamming people to make money, get REAL. Green scum on a pond.