Energy drinks

How much caffeine is in REIGN Total Body Fuel?

A US 16 fl oz REIGN can lists 300 mg. Formulations in other countries can be lower, so check the local label.

How long might it remain?

Using the calculator’s five-hour half-life model, this serving would take approximately 17.9 hours to fall below 25 mg. This is a mathematical estimate, not a measurement of your body.

Source: REIGN product information

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