Description As we age, our mental acuity naturally declines. Take steps now to help stay mentally sharp tomorrow. NUTRILITE? MEMORY BUILDERTM dietary supplement contains a unique and complementary combination of standardized extracts of Ginkgo biloba and Cistanche tubulosa. Research suggests Ginkgo biloba provides quick support for mental performance, 4-6 hours after taking, while preliminary research shows that daily intake of 300 mg of Nutrilite's standardized Cistanche tubulosa may improve memory, focus, and recall over a longer period of time, or a period of weeks.