Reign Total Body Fuel has more caffeine than Sunkist Zero Sugar on both counts: 300mg per 16 oz can against 19mg per 12 oz can, and about 19mg per fluid ounce against 2. The serving sizes differ, so the table below shows both ways of counting.
These are different categories of drink, which changes how the caffeine arrives. Energy drinks and sodas list an exact number because caffeine is a measured additive; brewed drinks vary with the beans and the brew, so their figures are compiled averages. The numbers here are the standard published values for each.
Reign Total Body Fuel vs Sunkist Zero Sugar: the numbers
| Reign Total Body Fuel | Sunkist Zero Sugar | |
|---|---|---|
| Caffeine per serving | 300mg per 16 oz can | 19mg per 12 oz can |
| Caffeine per fl oz | 18.8mg | 1.6mg |
| Servings to reach 400mg (FDA context) | 1.3 | 21.1 |
Sources: Reign Total Body Fuel's figure is verified in our Reign Total Body Fuel caffeine guide against Caffeine Informer (source); Sunkist Zero Sugar's figure is verified in our Sunkist Zero Sugar guide against Caffeine Informer (source).
The concentration gap is the striking part: Reign Total Body Fuel packs roughly 12 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 Sunkist Zero Sugar 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
- Sunkist Zero Sugar: the full caffeine guide
- The verified caffeine database
FAQ
Does Reign Total Body Fuel or Sunkist Zero Sugar have more caffeine? Reign Total Body Fuel: 300mg per 16 oz can versus 19mg per 12 oz can for Sunkist Zero Sugar.
Which is stronger per ounce? Reign Total Body Fuel, at about 18.8mg per fluid ounce versus 1.6mg for Sunkist Zero Sugar.
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