Before you start putting together the perfect blend for your personal needs, you need to know what natural options are available. It is also important to learn about the scientific research that confirms their cognitive properties. That's why this list has been compiled with some of the most popular options that are appearing today as ingredients or components of the best smart drug stacks. And, as always, when in doubt, talk to your doctor or pharmacist. Some active ingredients can cause unwanted side effects or combined effects.

1. huperzine-A

Many people classify huperzine-A as a natural nootropic because it is extracted from the Chinese club. Although some laboratory methods are used to produce this nootropic,...