What is a nootropic green tea? Our instant green tea is that and so much more... Functional food is defined as any food or drink that has a potentially positive effect on a person's health, and a nootropic is particularly effective in supporting cognitive function. All foods are functional to some extent because all foods provide flavor, aroma, and nutrition content. Green tea is the most widely consumed type of tea worldwide, and it generally has a bit of naturally occurring nootropic L-Theanine. The consumption of green tea is ancient especially in the Eastern part of the globe in addition...