Energy drinks

How much caffeine is in Rockstar Original Energy?

Caffeine for the current US 16 fl oz Original can. Other Rockstar lines include materially different caffeine amounts.

How long might it remain?

Using the calculator’s five-hour half-life model, this serving would take approximately 13.4 hours to fall below 25 mg. This is a mathematical estimate, not a measurement of your body.

Source: Rockstar Energy product information

Product formulations can change. Check the current package or menu for the serving you consumed.