Abstract: The invention relates to a method for providing an awaking effect and specifically affecting post lunch dip in a subject comprising providing a subject with a composition comprising an isolate of guarana plant, and at least one of (i) isolate of ginkgo biloba plant or functional analog thereof and (ii) fruit sugars, wherein the composition does not affect the subject's heart activity. The invention further provides a method for affecting post lunch dip in a subject, comprising administering to the subject a daily dose of a composition comprising (i) an isolate of guarana plant, (ii) an isolate of ginkgo biloba plant or functional analog thereof and (iii) fruit sugars for a period of at least 7 days.