Reign Total Body Fuel has more caffeine than SToK Extra Bold cold brew on both counts: 300mg per 16 oz can against 170mg per 12 oz serving, and about 19mg per fluid ounce against 14. 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 SToK Extra Bold cold brew: the numbers
| Reign Total Body Fuel | SToK Extra Bold cold brew | |
|---|---|---|
| Caffeine per serving | 300mg per 16 oz can | 170mg per 12 oz serving |
| Caffeine per fl oz | 18.8mg | 14.2mg |
| Servings to reach 400mg (FDA context) | 1.3 | 2.4 |
Sources: Reign Total Body Fuel's figure is verified in our Reign Total Body Fuel caffeine guide against Caffeine Informer (source); SToK Extra Bold cold brew's figure is verified in our SToK Extra Bold cold brew guide against SToK FAQ (source).
Which one should you pick?
Pick SToK Extra Bold cold brew 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
- SToK Extra Bold cold brew: the full caffeine guide
- The verified caffeine database
FAQ
Does Reign Total Body Fuel or SToK Extra Bold cold brew have more caffeine? Reign Total Body Fuel: 300mg per 16 oz can versus 170mg per 12 oz serving for SToK Extra Bold cold brew.
Which is stronger per ounce? Reign Total Body Fuel, at about 18.8mg per fluid ounce versus 14.2mg for SToK Extra Bold cold brew.
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.