ZOA has more caffeine than Dunkin Sparkd Energy (medium) on both counts: 160mg per 12 oz can against 144mg per 24 oz medium, and about 13mg per fluid ounce against 6. The serving sizes differ, so the table below shows both ways of counting.
ZOA vs Dunkin Sparkd Energy (medium): the numbers
| ZOA | Dunkin Sparkd Energy (medium) | |
|---|---|---|
| Caffeine per serving | 160mg per 12 oz can | 144mg per 24 oz medium |
| Caffeine per fl oz | 13.3mg | 6.0mg |
| Servings to reach 400mg (FDA context) | 2.5 | 2.8 |
Sources: ZOA's figure is verified in our ZOA caffeine guide against ZOA FAQ (source); Dunkin Sparkd Energy (medium)'s figure is verified in our Dunkin Sparkd Energy (medium) guide against Caffeine Informer Dunkin guide (source).
Which one should you pick?
Pick Dunkin Sparkd Energy (medium) when you want the lighter dose or a slower ramp, and ZOA 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
- ZOA: the full caffeine guide
- Dunkin Sparkd Energy (medium): the full caffeine guide
- The verified caffeine database
FAQ
Does ZOA or Dunkin Sparkd Energy (medium) have more caffeine? ZOA: 160mg per 12 oz can versus 144mg per 24 oz medium for Dunkin Sparkd Energy (medium).
Which is stronger per ounce? ZOA, at about 13.3mg per fluid ounce versus 6.0mg for Dunkin Sparkd Energy (medium).
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.