How much caffeine is in Reign Total Body Fuel?

A 16 fl oz can of Reign Total Body Fuel has 300 mg of caffeine.

That's about 3 cups of brewed coffee, and three quarters of the 400 mg a day the FDA cites for most healthy adults.

Source: reignbodyfuel.com · checked 10 Nov 2026

When did you have it?

Had at 3 pm, about 105 mg is still in you at an 11 pm bedtime. That will probably keep you up.

Bedtime

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Latest time to drink it

For an 11 pm bedtime, most people should finish a 16 fl oz can of Reign Total Body Fuel by about 9:35 am. The table works it out for other bedtimes and for how sensitive you are: it is the latest time to start one so that the caffeine left stays under the line all night.

Bedtime	Very sensitive under 25 mg	Average under 50 mg	Not very sensitive under 100 mg
9 pm	Too much for one evening	7:35 am	12:35 pm
10 pm	Too much for one evening	8:35 am	1:35 pm
11 pm	Too much for one evening	9:35 am	2:35 pm
Midnight	5:35 am	10:35 am	3:35 pm
1 am	6:35 am	11:35 am	4:35 pm

For a 16 fl oz can of Reign Total Body Fuel, average clearance (half-life 5 h), 8 hours of sleep. "Any time" means even one at bedtime stays under the line.

How long it lasts

The caffeine from a 16 fl oz can of Reign Total Body Fuel peaks in your blood about 75 minutes after you start it, at roughly 256 mg. Half of it is gone in about 5 hours for an average adult; that ranges from roughly 3 to 7 hours, and longer in pregnancy or with some medicines.

Time after	3 hours	6 hours	9 hours	12 hours
Still in you	211 mg	139 mg	92 mg	61 mg

So one had at 3 pm leaves about 105 mg at 11 pm. How long caffeine lasts explains the curve.

How it compares

Reign Total Body Fuel is stronger than 95% of the 41 energy drinks we track, by caffeine per serving.

Per fluid ounce (19 mg) it is stronger than 89% of them.

To reach 400 mg in a day you would need about 1½ of these.

Less caffeine

Celsius Essentials 270 mg, 16 fl oz can
Rockstar Punched 240 mg, 16 fl oz can
5-hour Energy Extra Strength 230 mg, 1 shot

Same caffeine: Bang Energy, Bucked Up Energy Drink.

FAQ

Is Reign Total Body Fuel high in caffeine?

Yes, very. A 16 fl oz can of Reign Total Body Fuel has 300 mg, which is 3.2 times an 8 fl oz cup of brewed coffee (95 mg).

Can I drink Reign Total Body Fuel at night?

Not if you want to sleep well. Had at 7 pm, it leaves about 183 mg in an average adult at an 11 pm bedtime, above the 50 mg most people sleep fine with. The latest time for an 11 pm bedtime is about 9:35 am.

How long does the caffeine in Reign Total Body Fuel last?

It peaks about 75 minutes after you start it. Of the 300 mg, about 139 mg is still in you 6 hours later and 61 mg after 12 hours, for an average adult with a 5-hour half-life.

Does Reign Total Body Fuel have more caffeine than a cup of coffee?

Yes. A 16 fl oz can of Reign Total Body Fuel has 300 mg; an 8 fl oz cup of coffee has 95 mg.

Method and limits

The caffeine figure comes from reignbodyfuel.com; recipes, brewing and batches vary, so a real serving can differ. The curves use a standard one-compartment model with an average 5-hour half-life and a sleep-friendly line of 50 mg; your own body may clear caffeine faster or slower. How it works has the details.

These are estimates for information, not medical advice. If you are pregnant, ask your doctor; common guidance is under 200 mg a day.