Yes, 5-hour Energy does contain caffeine. Caffeine is one of the primary active ingredients that contribute to the product's energy-boosting effects. An average 2-ounce shot of 5-hour Energy contains about 200 milligrams of caffeine, which is roughly equivalent to the amount found in two cups of coffee. It is important to note that the exact caffeine content may vary depending on the specific flavor or formulation of the product. Individuals who are sensitive to caffeine or who consume other caffeinated beverages should be mindful of their overall caffeine intake to avoid potential side effects such as jitters or increased heart rate. For those seeking detailed ingredient information, visiting the official 5-hour Energy website would be helpful.