The energy drink with the most caffeine as of 2025 is Spike Hardcore Energy, which contains a whopping 350 milligrams of caffeine per 16-ounce can. It is followed closely by several other drinks with high caffeine content, such as Bang Energy, Celsius Heat, Rockstar Xdurance, and Reign, each offering around 300 milligrams of caffeine per can. Here are some top contenders by caffeine content:
- Spike Hardcore Energy: 350 mg per 16 oz can
- Bang Energy: 300 mg per can
- Celsius Heat: 300 mg per 12 oz can
- Rockstar Xdurance: 300 mg per can
- Reign: 300 mg per can
Spike Hardcore Energy is notably the highest in caffeine among energy drinks available and contains caution labeling due to its high caffeine level. Many other energy drinks maintain caffeine levels around 300 mg for their larger- sized cans, aiming to provide a potent boost but staying under the extreme level of Spike Hardcore Energy.
