A method and formulation for fluids, such as drinking water, containing plant phytochemicals are disclosed. Some plants can survive in water without a root system, and the formulation includes fluid, such as water, with one or more of the plants maintained in the fluid. Cold storage resulted in enhanced production and excretion of phytochemicals from the plants into the fluid, including bacosides and bacopasides. These phytochemicals have been shown to exhibit antioxidant properties, promote memory and provide additional health benefits, as well as replace bottled water or other fluids as a means to ensure proper hydration. The fluids are useful for enhancing alertness.