Reign Storm has more caffeine than Dunkin Sparkd Energy (medium) on both counts: 200mg per 12 oz can against 144mg per 24 oz medium, and about 17mg per fluid ounce against 6. The serving sizes differ, so the table below shows both ways of counting.
Dunkin Sparkd Energy (medium) vs Reign Storm: the numbers
| Dunkin Sparkd Energy (medium) | Reign Storm | |
|---|---|---|
| Caffeine per serving | 144mg per 24 oz medium | 200mg per 12 oz can |
| Caffeine per fl oz | 6.0mg | 16.7mg |
| Servings to reach 400mg (FDA context) | 2.8 | 2.0 |
Sources: Dunkin Sparkd Energy (medium)'s figure is verified in our Dunkin Sparkd Energy (medium) caffeine guide against Caffeine Informer Dunkin guide (source); Reign Storm's figure is verified in our Reign Storm guide against Caffeine Informer (source).
Which one should you pick?
Pick Dunkin Sparkd Energy (medium) when you want the lighter dose or a slower ramp, and Reign Storm 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
- Dunkin Sparkd Energy (medium): the full caffeine guide
- Reign Storm: the full caffeine guide
- The verified caffeine database
FAQ
Does Dunkin Sparkd Energy (medium) or Reign Storm have more caffeine? Reign Storm: 200mg per 12 oz can versus 144mg per 24 oz medium for Dunkin Sparkd Energy (medium).
Which is stronger per ounce? Reign Storm, at about 16.7mg per fluid ounce versus 6.0mg for Dunkin Sparkd Energy (medium).
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