Caffeine From All Sources: 160 mg per can. Tear into a can of the meanest energy drink on the planet, Monster Energy. It's the ideal combo of the right ingredients in the right proportion to deliver the big bad buzz that only Monster can. Monster packs a powerful punch but has smooth easy drinking flavor. Athletes, musicians, anarchists, co-ed's, road warriors, metal heads, geeks, hipsters, and bikers dig it you will too. Unleash the beast! monsterenergy.com.