UltraCell Intensive-XT cellular concentrate is the ultimate skin revitalization formula with an unparalleled Cellular Index (CI) of 8. With an unprecedented concentration of signature CytoPep™ Cellular Extracts, this 24-day cellular concentrate program provides a solution that better addresses the needs of mature skin, as well as skin heavily exposed to external elements. Rediscover firmer, luminous skin that is perfectly moisturized. 0.81 fl. oz. Made in Switzerland.