G Fuel Energy (can) vs C4 Performance Energy: which has more caffeine?

G Fuel Energy (can) has more caffeine than C4 Performance Energy: 300mg vs 200mg in the same 16 oz can. That is a 100mg gap, and since the cans match, the per-serving number is the whole story.

G Fuel Energy (can) vs C4 Performance Energy: the numbers

Sources: G Fuel Energy (can)'s figure is verified in our G Fuel Energy (can) caffeine guide against G Fuel product page (source); C4 Performance Energy's figure is verified in our C4 Performance Energy guide against Caffeine Informer (source).

Which one should you pick?

Pick C4 Performance Energy when you want the lighter dose or a slower ramp, and G Fuel Energy (can) 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

• G Fuel Energy (can): 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 G Fuel Energy (can) or C4 Performance Energy have more caffeine? G Fuel Energy (can): 300mg per 16 oz can versus 200mg per 16 oz can for C4 Performance Energy.

Which is stronger per ounce? G Fuel Energy (can), at about 18.8mg per fluid ounce versus 12.5mg for C4 Performance Energy.