Energy drink
Caffeine in C4 Energy Drink
200mg
per 16 oz
≈ 2 coffees≈ 3 Red Bulls50% of FDA daily max
Is that a lot?
C4 Energy Drink is 50% of the FDA’s recommended daily maximum, in a single 16 oz.
Green tea
Espresso
Red Bull
Coffee
C4 Energy Drink
FDA daily max · 400mg
Before bed
When can I drink C4 Energy Drink and still sleep?
Your C4 Energy Drink cutoff
You drink it at
Bedtime
C4 Energy Drink · 200 mg · assuming an average ~5 h half-life
At bedtime
66 mg
may delay sleep
Latest safe C4 Energy Drink: 1:00 PM
How much caffeine is in C4 Energy Drink?
A C4 Energy Drink typically carries about 200 mg of caffeine per 16 oz can, with the Ultimate line climbing toward 300 mg. Sugar-free and gym-focused, the standard can equals roughly two and a half Red Bulls.
| Serving | Caffeine | Sugar |
|---|---|---|
| 16 oz | 200 mg | 0 g |
C4 Ultimate can ≈ 300 mg; Smart Energy ≈ 200 mg.
Will C4 Energy Drink affect your sleep?
From 200 mg, C4 needs around ten hours to fall under 50 mg, so a lunchtime can can still be active at bedtime. If you've got the higher-strength version, it lingers even longer.
Heads up
At 200 mg, a second C4 Energy Drink 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