Reign Total Body Fuel vs Dunkin Sparkd Energy (medium): which has more caffeine?

Reign Total Body Fuel has more caffeine than Dunkin Sparkd Energy (medium) on both counts: 300mg per 16 oz can against 144mg per 24 oz medium, and about 19mg per fluid ounce against 6. The serving sizes differ, so the table below shows both ways of counting.

Reign Total Body Fuel vs Dunkin Sparkd Energy (medium): the numbers

Sources: Reign Total Body Fuel's figure is verified in our Reign Total Body Fuel caffeine guide against Caffeine Informer (source); Dunkin Sparkd Energy (medium)'s figure is verified in our Dunkin Sparkd Energy (medium) guide against Caffeine Informer Dunkin guide (source).

The concentration gap is the striking part: Reign Total Body Fuel packs roughly 3 times the caffeine per ounce. Sipping speed matters at that density; a 16 oz can finished in minutes hits differently than the same milligrams spread over a slow cup.

Which one should you pick?

Pick Dunkin Sparkd Energy (medium) when you want the lighter dose or a slower ramp, and Reign Total Body Fuel 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

• Reign Total Body Fuel: the full caffeine guide
• Dunkin Sparkd Energy (medium): the full caffeine guide
• The verified caffeine database

FAQ

Does Reign Total Body Fuel or Dunkin Sparkd Energy (medium) have more caffeine? Reign Total Body Fuel: 300mg per 16 oz can versus 144mg per 24 oz medium for Dunkin Sparkd Energy (medium).

Which is stronger per ounce? Reign Total Body Fuel, at about 18.8mg per fluid ounce versus 6.0mg for Dunkin Sparkd Energy (medium).