Caffeine & Sleep
Soda

Caffeine in Dr Pepper Zero Sugar

41mg
per 12 oz
≈ 1 Red Bull10% of FDA daily max

Is that a lot?

Dr Pepper Zero Sugar is 10% of the FDA’s recommended daily maximum, in a single 12 oz.

Green tea
28 mg
Dr Pepper Zero Sugar
41 mg
Espresso
63 mg
Red Bull
80 mg
Coffee
95 mg
FDA daily max · 400mg
Before bed

When can I drink Dr Pepper Zero Sugar and still sleep?

Your Dr Pepper Zero Sugar cutoff
You drink it at
Bedtime
Dr Pepper Zero Sugar · 41 mg · assuming an average ~5 h half-life
At bedtime
14 mg
close to optimal
Latest safe Dr Pepper Zero Sugar: 11:00 PM

How much caffeine is in Dr Pepper Zero Sugar?

Dr Pepper Zero Sugar matches the regular version on caffeine at about 41 mg per 12 oz can, while dropping the sugar. You get the same 23-flavor taste and a light caffeine kick without the calories.

ServingCaffeineSugar
12 oz41 mg0 g

Will Dr Pepper Zero Sugar affect your sleep?

At 41 mg, Dr Pepper Zero starts below the 50 mg sleep-threshold and clears within a couple of hours. Its caffeine is light enough that an evening can rarely affects sleep.

Source: Manufacturer label

Related drinks

Dr Pepper Zero Sugar & sleep — FAQ

Unlikely, at about 41 mg it stays under the 50 mg threshold, so a Dr Pepper Zero shouldn't keep most people up at night.

Dr Pepper Zero Sugar has 41 mg per 12 oz — about 10% of the FDA’s 400 mg daily maximum for healthy adults.

It depends on your bedtime and how fast you clear caffeine. Use the calculator above to see when Dr Pepper Zero Sugar 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