Reign Total Body Fuel 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.
Reign Total Body Fuel vs C4 Performance Energy: the numbers
| Reign Total Body Fuel | C4 Performance Energy | |
|---|---|---|
| Caffeine per serving | 300mg per 16 oz can | 200mg per 16 oz can |
| Caffeine per fl oz | 18.8mg | 12.5mg |
| Servings to reach 400mg (FDA context) | 1.3 | 2.0 |
Sources: Reign Total Body Fuel's figure is verified in our Reign Total Body Fuel 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 C4 Performance Energy when you want the lighter dose or a slower ramp, and Reign Total Body Fuel 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
- Reign Total Body Fuel: the full caffeine guide
- C4 Performance Energy: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
FAQ
Does Reign Total Body Fuel or C4 Performance Energy have more caffeine? Reign Total Body Fuel: 300mg per 16 oz can versus 200mg per 16 oz can for C4 Performance Energy.
Which is stronger per ounce? Reign Total Body Fuel, at about 18.8mg per fluid ounce versus 12.5mg for C4 Performance Energy.
Comparing caffeine? The caffeine comparison tool puts hundreds of drinks side by side, and the caffeine curfew calculator can check your cutoff time for tonight.