NOS Energy has more caffeine than Dunkin Sparkd Energy (medium) on both counts: 160mg per 16 oz can against 144mg per 24 oz medium, and about 10mg per fluid ounce against 6. The serving sizes differ, so the table below shows both ways of counting.
Dunkin Sparkd Energy (medium) vs NOS Energy: the numbers
| Dunkin Sparkd Energy (medium) | NOS Energy | |
|---|---|---|
| Caffeine per serving | 144mg per 24 oz medium | 160mg per 16 oz can |
| Caffeine per fl oz | 6.0mg | 10.0mg |
| Servings to reach 400mg (FDA context) | 2.8 | 2.5 |
Sources: Dunkin Sparkd Energy (medium)'s figure is verified in our Dunkin Sparkd Energy (medium) caffeine guide against Caffeine Informer Dunkin guide (source); NOS Energy's figure is verified in our NOS Energy 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 NOS 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
- Dunkin Sparkd Energy (medium): the full caffeine guide
- NOS Energy: the full caffeine guide
- The verified caffeine database
FAQ
Does Dunkin Sparkd Energy (medium) or NOS Energy have more caffeine? NOS Energy: 160mg per 16 oz can versus 144mg per 24 oz medium for Dunkin Sparkd Energy (medium).
Which is stronger per ounce? NOS Energy, at about 10.0mg 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.