Adrenaline Shoc has more caffeine than Rockstar XDurance: 300mg vs 300mg in the same 16 oz can. That is a 0mg gap, and since the cans match, the per-serving number is the whole story.
Adrenaline Shoc vs Rockstar XDurance: the numbers
| Adrenaline Shoc | Rockstar XDurance | |
|---|---|---|
| Caffeine per serving | 300mg per 16 oz can | 300mg per 16 oz can |
| Caffeine per fl oz | 18.8mg | 18.8mg |
| Servings to reach 400mg (FDA context) | 1.3 | 1.3 |
Sources: Adrenaline Shoc's figure is verified in our Adrenaline Shoc caffeine guide against Caffeine Informer (source); Rockstar XDurance's figure is verified in our Rockstar XDurance guide against Rockstar product page / Caffeine Informer (source).
Which one should you pick?
Pick Rockstar XDurance when you want the lighter dose or a slower ramp, and Adrenaline Shoc 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
- Adrenaline Shoc: the full caffeine guide
- Rockstar XDurance: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
- Compare any two of 120+ drinks
FAQ
Does Adrenaline Shoc or Rockstar XDurance have more caffeine? Adrenaline Shoc: 300mg per 16 oz can versus 300mg per 16 oz can for Rockstar XDurance.
Which is stronger per ounce? Adrenaline Shoc, at about 18.8mg per fluid ounce versus 18.8mg for Rockstar XDurance.
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