A nootropic stack is a mixture of nootropic ingredients into a single nootropic blend. The reason the word stack is used is because when added together into a “stack” the combined effects can be greater than the effects of any individual ingredient. Nootroo is a nootropic stack combined of four ingredients in two different blends. The reason Nootroo is considered by many to be the the best nootropic stack on the market is because the stack is perfectly balanced to bring out the best in the brain. Nootroo is made up of two different nootropic stacks: the Gold nootropic stack, brings together the stack of Noopept and CDP Choline with the nootropic stack of Caffeine and L-theanine in our proprietary nootropic blend called SmoothCaffeine.