How much caffeine is in C4 Pre-Workout (Standard Scoop)?
中文：C4 训练前补剂（标准舀）
Caffeine content
150 mg
Typical range: 135–200 mg
per 1 scoop (~6.5g)
About this drink
Pre-workout supplements typically deliver 150-300 mg caffeine per scoop. Many users 'double scoop' bringing it to 300+ mg. Combined with beta-alanine and creatine for performance, but the caffeine does most of the perceived work.
Ingredients: Caffeine anhydrous, beta-alanine, creatine, citrulline, arginine
When will it clear your system?
150 mg of anhydrous caffeine absorbs even faster than energy drinks. Don't take pre-workout after 2pm — the rapid absorption + half-life math wrecks sleep timing.
Based on caffeine's 5-hour half-life, a C4 Pre-Workout (Standard Scoop) consumed at 2:00 PM drops below the sleep-safe threshold (~20 mg) by approximately 04:32 the same evening.
Where this fits in a daily limit
That's roughly 75% of the 200 mg pregnancy guideline and 38% of the 400 mg general adult daily limit. One drink uses most of a pregnancy-safe day.
See our pregnancy caffeine guide or half-life sleep math for the deep dive.
How it compares
| Drink | Caffeine |
|---|---|
C4 Pre-Workout (Standard Scoop) Cellucor | 150 mg |
| Celsius (12oz can) Celsius | 200 mg |
| 5-Hour Energy (Regular) 5-Hour Energy | 200 mg |
| Monster Energy (16oz can) Monster | 160 mg |
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Learn more about SipNoteFrequently asked questions
How much caffeine is in a C4 Pre-Workout (Standard Scoop)?
A 1 scoop (~6.5g) C4 Pre-Workout (Standard Scoop) contains approximately 150 mg of caffeine. Actual values may range from 135 to 200 mg depending on preparation and source variation.
Is C4 Pre-Workout (Standard Scoop) safe during pregnancy?
The current ACOG and NHS guideline is under 200 mg of caffeine per day during pregnancy. A single C4 Pre-Workout (Standard Scoop) uses most of the daily pregnancy allowance. Always consult your obstetrician for personalized advice.
When should I stop drinking C4 Pre-Workout (Standard Scoop) for sleep?
Caffeine has a 5-hour half-life. To have under 20 mg circulating at bedtime (the typical sleep-safe threshold), stop drinking C4 Pre-Workout (Standard Scoop) about 15 hours before sleep. 150 mg of anhydrous caffeine absorbs even faster than energy drinks. Don't take pre-workout after 2pm — the rapid absorption + half-life math wrecks sleep timing.
C4 Pre-Workout (Standard Scoop) vs Celsius (12oz can) — which has more caffeine?
C4 Pre-Workout (Standard Scoop) contains 150 mg per serving; Celsius (12oz can) contains 200 mg per 12 fl oz (355 ml). Celsius (12oz can) is the stronger of the two.
Does C4 Pre-Workout (Standard Scoop) keep you awake?
150 mg is moderate caffeine. For sleep-sensitive people, C4 Pre-Workout (Standard Scoop) after noon may affect sleep onset and quality.
Caffeine values shown are typical for the listed serving size. Actual content varies by preparation, brewing method, batch, and brand reformulation. Not medical advice — consult a healthcare provider for personalized guidance.