Source-backed comparison
Red Bull vs Monster caffeine in the UK
Compare the manufacturer-listed caffeine in a UK 250 ml Red Bull and a UK 500 ml Monster Original Green, including serving and concentration differences.
| Measure | Red Bull Energy Drink | Monster Energy Original Green |
|---|---|---|
| Named serving | 250 ml can | 500 ml can |
| Market | UK | UK |
| Caffeine per serving | 80 mg | 160 mg |
| Caffeine per 100 ml | 32.0 mg | 32.0 mg |
| Value basis | Manufacturer listed | Manufacturer listed |
| Estimated after 5 hours | 40 mg | 80 mg |
How to interpret the comparison
- A standard UK Red Bull contains 80 mg in 250 ml, while the named UK Monster can contains 160 mg in 500 ml.
- Both manufacturers list 32 mg per 100 ml for these products, so the full Monster can contains twice as much because its named serving is twice the volume.
- This compares the named Original products only. Other sizes, product lines and countries can use different formulations.
Calculated five-hour timeline
This table applies the same exponential half-life equation to both starting amounts. It does not show measured blood levels or predict which drink will affect a particular person more.
| Hours after serving | Red Bull Energy Drink | Monster Energy Original Green |
|---|---|---|
| 0 | 80 mg | 160 mg |
| 3 | 52.8 mg | 105.6 mg |
| 5 | 40 mg | 80 mg |
| 8 | 26.4 mg | 52.8 mg |
| 10 | 20 mg | 40 mg |
| 12 | 15.2 mg | 30.3 mg |
Sources
- Red Bull GB product informationUK product page for the standard 250 ml can.
- Monster Energy UK product informationUK Original Green product page.