Does Propel have calories?

The 20 oz bottles list 0 calories and 0 g of sugar. Some powder sticks list up to 5 calories.

Does Propel break ketosis?

No. It has no sugar or carbohydrate to affect ketosis.

Is Propel or Gatorade Zero better while fasting?

Both are sugar-free with similar sodium, about 270 mg per 20 oz. Gatorade Zero lists a few more calories; either is fine.

Does Propel Energy Boost break a fast?

No. It is zero sugar like regular Propel and adds about 100 to 118 mg of caffeine, which can cause jitters on an empty stomach.

Does Propel Break a Fast? No

Reviewed by the FastTrack team · Updated June 2026

Short answer: No

Propel does not break a fast. A 20 oz bottle of Propel electrolyte water has 0 calories and 0 g of sugar, sweetened with sucralose and acesulfame potassium, plus about 270 mg of sodium. The powder sticks are also zero sugar and list 0 to 5 calories.

Calories	~0 kcal per 20 oz
Breaks a weight-loss fast?	No
Breaks ketosis?	No
Breaks autophagy?	Unlikely
Insulin impact	Minimal

Why Propel keeps you fasted

Propel is flavored water with electrolytes and vitamins B, C and E, made by Gatorade. With no sugar and no calories, it gives your body nothing to digest and no reason to release insulin. The sodium, about 270 mg per bottle, is a small bonus on long or active fasting days.

Sweeteners, caffeine and sodium

Sucralose and acesulfame potassium have no calories, and studies mostly show little or no insulin response in people, though sweet drinks keep cravings going for some. Propel Energy Boost adds about 100 mg of caffeine per 16.9 oz bottle, so count it toward your daily total. On fasts of 24 hours or more, one bottle covers only part of the sodium you lose; salt or a stronger electrolyte drink does more.

How much is safe

One or two bottles a day during the fast are fine. Plain water should still make up most of what you drink.

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Frequently asked questions

Does Propel have calories?: The 20 oz bottles list 0 calories and 0 g of sugar. Some powder sticks list up to 5 calories.
Does Propel break ketosis?: No. It has no sugar or carbohydrate to affect ketosis.
Is Propel or Gatorade Zero better while fasting?: Both are sugar-free with similar sodium, about 270 mg per 20 oz. Gatorade Zero lists a few more calories; either is fine.
Does Propel Energy Boost break a fast?: No. It is zero sugar like regular Propel and adds about 100 to 118 mg of caffeine, which can cause jitters on an empty stomach.