GU is a convenient, great tasting carbohydrate gel formulated to energize before, sustain during, and aid in recovery after training and competitions. Made with a unique blend of ingredients, GU provides: complex carbohydrates for sustained energy, amino acids to maintain muscle protein, antioxidants and muscle buffers to aid with recovery and GU's patented herbal blend for enhanced energy production. GU helps you feel and perform your best. GU's unique herbal blend combines the perfect fusion of herbs for energy-enhancement (cola-nut), anti-inflammatory (chamomile), and stomach buffering (ginger). GU contains 20mg (equivalent to 1/5 cup of coffee) per serving from cola-nut. All flavors have the same level of caffeine. The caffeine level in GU is not enough to give a "caffeine rush," but is added to help you utilize body fat as an additional fuel source during activity. Gu Energy Gel comes in ten flavors -- Tri-Berry, Chocolate Outrage, Espresso Love, Jet Blackberry, Lemon Sublime, Mint Chocolate, Peanut Butter, Mandarin Orange, Just Plain, Strawberry Banana, and Vanilla Bean. They come in a box of 24 gel packets.