Cortexi UK You may get Cortexi UK from the official website, where it costs $69 per bottle right now. If you buy the three-bottle set, you can save money by purchasing a bottle for $59. You may acquire the six-bottle deal for $49 each bottle if you want to save a lot of money. A bottle will keep you going for 30 days.If Cortexi UK does not work for you, you can get your money back with a 60-day money-back guarantee. Simply call the company and return the merchandise or empty bottles, and you will receive your money within 48 hours.