C4 Ultimate Energy has more caffeine than Alani Nu on both counts: 300mg per 16 oz can against 200mg per 12 oz can, and about 19mg per fluid ounce against 17. The serving sizes differ, so the table below shows both ways of counting.
C4 Ultimate Energy vs Alani Nu: the numbers
| C4 Ultimate Energy | Alani Nu | |
|---|---|---|
| Caffeine per serving | 300mg per 16 oz can | 200mg per 12 oz can |
| Caffeine per fl oz | 18.8mg | 16.7mg |
| Servings to reach 400mg (FDA context) | 1.3 | 2.0 |
Sources: C4 Ultimate Energy's figure is verified in our C4 Ultimate Energy caffeine guide against Caffeine Informer (source); Alani Nu's figure is verified in our Alani Nu guide against Alani Nu label (source).
Which one should you pick?
Pick Alani Nu when you want the lighter dose or a slower ramp, and C4 Ultimate 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
- C4 Ultimate Energy: the full caffeine guide
- Alani Nu: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
- Compare any two of 120+ drinks
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Gear from this guide
FAQ
Does C4 Ultimate Energy or Alani Nu have more caffeine? C4 Ultimate Energy: 300mg per 16 oz can versus 200mg per 12 oz can for Alani Nu.
Which is stronger per ounce? C4 Ultimate Energy, at about 18.8mg per fluid ounce versus 16.7mg for Alani Nu.
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