Evidence reviewed 4 September 2026
Monster Energy UK caffeine guide
Compare the documented UK 500 ml Original Green and Ultra White caffeine amounts, serving concentrations and source dates. Other flavours and US recipes can differ.
Guide updated 2026-11-04
Which recorded Monster serving has less caffeine?
The short answer
Of the two UK 500 ml records currently in this catalogue, Ultra White is lower than Original Green. This isn’t an exhaustive ranking of all Monster flavours or sizes.
Compare the serving sizes
These figures come from the sources linked below. Your drink may vary, and recipes can change, so check the latest label or menu if you need an exact amount.
| Drink / market | Serving | Caffeine | Per 100 ml | Evidence / action |
|---|---|---|---|---|
| Monster Ultra WhiteUK | 500 ml can | 150 mg | 30 mg (calculated) | Manufacturer listedVerified source record · Reviewed 2026-10-23Use this dose · Compare |
| Monster Energy Original GreenUK | 500 ml can | 160 mg | 32 mg (calculated) | Manufacturer listedVerified source record · Reviewed 2026-10-23Use this dose · Compare |
Bars use the selected measure; numbers remain visible in both units. No bar is drawn for an unknown concentration. Per 100 ml = serving caffeine × 100 ÷ listed volume.
Coverage is part of the answer
The smallest figure in a partial catalogue isn’t necessarily the smallest product sold anywhere. Check the current label for flavours or package sizes not represented here. Other markets shouldn’t be added to a UK ranking without being clearly separated.
Use concentration for unequal cans
When volumes differ, compare both total caffeine and milligrams per 100 ml. A smaller can can reduce the total without changing the recipe concentration. Neither measure establishes health or suitability.
Sources and notes
- Monster Energy UK Ultra product informationOfficial UK product page; Monster notes figures are based on 500 ml and can vary by region. Source reviewed 2026-10-23.
- Monster Energy UK product informationUK Original Green product page. Source reviewed 2026-10-23.
Use this guide to compare drinks, not to make medical decisions. We have marked estimates and calculations so you can tell them apart from published amounts. Check the latest label or menu if you need an exact figure.
Quick answer
Monster Energy caffeine ranges from 150 to 160 mg in this reviewed UK dataset
The lowest listed serving is Monster Ultra White — 500 ml can; the highest is Monster Energy Original Green — 500 ml can. The table below links each serving to its first-party source and review details.
Numeric caffeine is published on the individual UK product pages represented here. Other flavours are omitted until their exact UK value has been checked.
Explore Monster Energy caffeine by drink and size
Filter the documented records, then open a drink page to inspect provenance and evidence quality before using that serving in the calculator.
| Drink | Serving | Caffeine | Evidence | Actions |
|---|---|---|---|---|
| Monster Energy Original Green | 500 ml can | 160 mg | Manufacturer listed | |
| Monster Ultra White | 500 ml can | 150 mg | Manufacturer listed |
Scope and limitations
- Every figure links to its own source and carries an evidence label; weaker evidence is never presented as a current first-party exact value.
- Custom drinks and recipe changes may differ from a standard listed serving.
- Rankings describe caffeine quantity; they don’t rate health, quality or suitability.