GNC Preventive Nutrition® Brain Health Formula With Clinically Studied Ingredients​ Memory Function & Nervous System Health: Provides Choline, Huperzine A And Tyrosine To Promote Key Neurotransmitters. Plus It Has Ginkgo Biloba To Memory Function And Mental Sharpness. Phosphatidylserine And Vitamins B-6 And B-12 Help To Maintian Nervous System Health. Blood Flow Support: Contains Nutrients To Healthy Blood Flow, Which Is Vital For Brain Health, Including Resvida®, Clinically Shown To Enhance Blood Vessel Dilation. ^ Ginkgo Biloba Also S Peripheral Blood Flow. Clinically Studied Ingredients Support Memory Function & Enhance Circulation^ Helps Preserve Key Neurotransmitters ^in A Randomized, Double-Blind, Placebo Controlled Crossover Study, 19 Volunteers Consumed 3 Doses Of Resvida® (30 Mg, 90 Mg, 270 Mg) And A Placebo At Weekly Intervals. Flow-Mediated Dilatation (Fmd) Of The Brachial Artery Was Measured One Hour After Ingestion Of Each Treatment And Was Significantly Increased At All 3 Doses Relative To Placebo. 30 Mg Of Resvida® Demonstrated 2. 5% Greater Increase In Fmd Relative To Placebo. | GNC Preventive Nutrition Brain Health Formula Healthy - 60 Caplets (30 Servings)