Xyience Xenergy has more caffeine than Rockstar Original: 176mg vs 160mg in the same 16 oz can. That is a 16mg gap, and since the cans match, the per-serving number is the whole story.
Xyience Xenergy vs Rockstar Original: the numbers
| Xyience Xenergy | Rockstar Original | |
|---|---|---|
| Caffeine per serving | 176mg per 16 oz can | 160mg per 16 oz can |
| Caffeine per fl oz | 11.0mg | 10.0mg |
| Servings to reach 400mg (FDA context) | 2.3 | 2.5 |
Sources: Xyience Xenergy's figure is verified in our Xyience Xenergy caffeine guide against Caffeine Informer (source); Rockstar Original's figure is verified in our Rockstar Original guide against Rockstar product page (source).
Which one should you pick?
Pick Rockstar Original when you want the lighter dose or a slower ramp, and Xyience Xenergy 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
- Xyience Xenergy: the full caffeine guide
- Rockstar Original: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
- Compare any two of 120+ drinks
FAQ
Does Xyience Xenergy or Rockstar Original have more caffeine? Xyience Xenergy: 176mg per 16 oz can versus 160mg per 16 oz can for Rockstar Original.
Which is stronger per ounce? Xyience Xenergy, at about 11.0mg per fluid ounce versus 10.0mg for Rockstar Original.
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