Enjoy Function Drinks Alternative Energy Citrus Yuzu (12x16.9 Oz). Get up and keep going with the first time-release formula for long-lasting energy. The all-natural combo of catuaba, muira pauma, epimedium, and yerba mate provides stamina support for up to 6 to 8 hours. (Please note information is descriptional only. Please refer ingredients on product prior to use and please consult your health professional with any health or dietary matters before use.)