Natural energy. Energy to replenish mental alertness during the marathon of a busy day. Vuka Think is a lightly carbonated pomegranate and lychee flavored drink focused on improving your mental prowess. Restore your brain power with: Natural Caffeine: 80 mg per serving; L-Theanine: 25 mg per serving; Panax Ginseng: 50 mg per serving. Other vitamins and natural energizers that will help you reach your potential: vitamins B3, B5, B6, B12 and grape seed extract. Vuka energy drinks are specifically formulated to give you the right kind of energy for the activities that fill your life. No preservatives. Natural ingredients. No high fructose corn syrup. Vuka.com.