Starbucks Flat White vs Reign Total Body Fuel: which has more caffeine?

Reign Total Body Fuel has more caffeine than Starbucks Flat White: 300mg vs 195mg in the same 16 oz can. That is a 105mg gap, and since the cans match, the per-serving number is the whole story.

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.

Starbucks Flat White vs Reign Total Body Fuel: the numbers

Sources: Starbucks Flat White's figure is verified in our Starbucks Flat White caffeine guide against Starbucks nutrition listing (source); Reign Total Body Fuel's figure is verified in our Reign Total Body Fuel guide against Caffeine Informer (source).

Which one should you pick?

Pick Starbucks Flat White 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

• Starbucks Flat White: the full caffeine guide
• Reign Total Body Fuel: the full caffeine guide
• The verified caffeine database
• Every drink compared: the comparisons index
• Compare any two of 120+ drinks

FAQ

Does Starbucks Flat White or Reign Total Body Fuel have more caffeine? Reign Total Body Fuel: 300mg per 16 oz can versus 195mg per 16 oz grande for Starbucks Flat White.

Which is stronger per ounce? Reign Total Body Fuel, at about 18.8mg per fluid ounce versus 12.2mg for Starbucks Flat White.