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Lowest calorie energy drinks

These are the energy drinks with the fewest calories per can, from Red Bull Sugarfree at 8 kcal to Monster Mango Loco at 239.

250 ml of pale golden energy drink with ice and fine bubbles in a clear glass
1Red Bull SugarfreeOne can (250 ml)8kcal2CelsiusOne can (355 ml)10kcal3Prime EnergyOne can (355 ml)10kcal4Monster UltraOne can (500 ml)11kcal5Red BullOne can (250 ml)110kcal6Energy drinkSmall can, 250 ml112kcal7Monster EnergyOne can (500 ml)235kcal8Monster Mango LocoOne can (500 ml)239kcal

Numbers for the portion shown, the same as on each food's page. Sports are for someone of about 70 kg.

The sugar free cans are all close to nothing: Red Bull Sugarfree, Celsius, Prime Energy and Monster Ultra sit between 8 and 11 kcal. After that there is a big jump.

Mind the can size. A Red Bull is 250 ml and a Monster 500 ml, so a big can of the sugary stuff is 235 kcal or more. Celsius and Prime are the US 355 ml can, the rest the European label.

Questions

What is the lowest calorie energy drink?

Red Bull Sugarfree at 8 kcal a can, followed closely by Celsius and Prime Energy at 10 and Monster Ultra at 11.

Which energy drink has the most calories?

Of these, Monster Mango Loco at 239 kcal a can, just above the green Monster at 235.

How much do I save swapping Monster for Monster Ultra?

224 kcal a can. The green one is 235, the Ultra is 11.

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