Each serving of JostArriba contains approximately 70 mg of naturally occurring caffeine from organic coffee extract—less than the typical cup of brewed coffee. It’s an option for those who enjoy a caffeine boost but prefer a lower-caffeine alternative to their usual brew.
JostArriba combines caffeine with L-theanine to support alertness and focused attention. Research on this pairing shows improvements in attention, task-switching accuracy, and certain measures of reaction time. L-theanine has also been studied for its relaxation-supporting properties, complementing caffeine’s stimulating effects.
