Bloom Energy vs C4 Performance Energy: which has more caffeine?

C4 Performance Energy carries more total caffeine per serving (200mg per 16 oz can vs 180mg per 12 oz can), but ounce for ounce Bloom Energy is actually the stronger drink at about 15mg per fluid ounce against 12. Which one "has more caffeine" depends on whether you measure the container or the concentration.

Bloom Energy vs C4 Performance Energy: the numbers

Sources: Bloom Energy's figure is verified in our Bloom Energy caffeine guide against Caffeine Informer (source); C4 Performance Energy's figure is verified in our C4 Performance Energy guide against Caffeine Informer (source).

Which one should you pick?

Pick Bloom Energy when you want the lighter dose or a slower ramp, and C4 Performance Energy when you actually need the bigger hit and know your tolerance. If you are stacking either with other caffeinated drinks through the day, run the math against the 400mg reference rather than guessing.

For context, the FDA cites 400mg of caffeine a day as an amount generally not associated with negative effects in healthy adults. Tolerance and health vary, so treat these numbers as information, not advice.

Related reading

• Bloom Energy: the full caffeine guide
• C4 Performance Energy: the full caffeine guide
• The verified caffeine database
• Every drink compared: the comparisons index
• Compare any two of 120+ drinks

FAQ

Does Bloom Energy or C4 Performance Energy have more caffeine? C4 Performance Energy: 200mg per 16 oz can versus 180mg per 12 oz can for Bloom Energy.

Which is stronger per ounce? Bloom Energy, at about 15.0mg per fluid ounce versus 12.5mg for C4 Performance Energy.