Caffeine & Sleep
Energy drink

Caffeine in Reign Total Body Fuel

300mg
per 16 oz
≈ 3 coffees≈ 4 Red Bulls75% of FDA daily max

Is that a lot?

Reign Total Body Fuel is 75% of the FDA’s recommended daily maximum, in a single 16 oz.

Green tea
28 mg
Espresso
63 mg
Red Bull
80 mg
Coffee
95 mg
Reign Total Body Fuel
300 mg
FDA daily max · 400mg
Before bed

When can I drink Reign Total Body Fuel and still sleep?

Your Reign Total Body Fuel cutoff
You drink it at
Bedtime
Reign Total Body Fuel · 300 mg · assuming an average ~5 h half-life
At bedtime
99 mg
may delay sleep
Latest safe Reign Total Body Fuel: 10:05 AM

How much caffeine is in Reign Total Body Fuel?

Reign Total Body Fuel brings a big 300 mg of caffeine to a 16 oz can, aimed squarely at the gym crowd. Sugar-free and loaded, it sits at the high end of the energy-drink scale.

ServingCaffeineSugar
16 oz300 mg0 g

Will Reign Total Body Fuel affect your sleep?

From 300 mg, Reign takes about fifteen hours to fall under 50 mg, so even a midday can can still be present at bedtime. This is a morning-or-pre-workout drink, not an evening one.

Heads up
At 300 mg, a second Reign Total Body Fuel in a day pushes you toward the FDA’s 400 mg ceiling — and that’s before any coffee or tea. Log everything in the calculator to see your real daily total.

Source: Manufacturer label

Related drinks

Reign Total Body Fuel & sleep — FAQ

Yes, very possibly, at 300 mg Reign is a high dose that can stay above the 50 mg threshold for most of the day, so an afternoon can may keep you up.

Reign Total Body Fuel has 300 mg per 16 oz — about 75% of the FDA’s 400 mg daily maximum for healthy adults. That’s roughly 3 cups of coffee.

It depends on your bedtime and how fast you clear caffeine. Use the calculator above to see when Reign Total Body Fuel drops below the ~50 mg “ok to sleep” threshold for your bedtime.

Track your caffeine. Sleep better.

The app does this live all day — one-tap logging, widgets, and a 30-minute pre-cutoff reminder. Free, no ads.

Get the App — it’s free