A C4 pre-workout drink needs to be identified by its full product name and format. A ready-to-drink C4 Performance Energy can has its own ingredient list. C4 Original powder, C4 Ultimate powder and other C4 beverage lines require separate comparisons; the brand name alone does not identify a formula.
What the current Performance Energy label shows
On October 13, 2026, Cellucor’s Performance Energy page displayed a Strawberry Watermelon Ice nutrition image with these amounts per one 16 fl oz can:
- 200 mg caffeine.
- 5 calories, zero total carbohydrate and zero sugars.
- 45 mg sodium and 90 mg potassium.
- 6 mcg vitamin B12.
The ingredient list includes CarnoSyn beta-alanine, BetaPower betaine anhydrous, caffeine anhydrous, sucralose and acesulfame potassium. Citrulline is absent from this particular list. The image does not disclose individual beta-alanine or betaine doses, so powder dosages cannot be used to fill in those blanks.
Why older cans give different answers
Manufacturer labels retained in NSF’s records show specific earlier STARBURST Strawberry versions: 16 fl oz with 200 mg caffeine and 10 calories, and 12 fl oz with 150 mg caffeine and zero calories. Both include citrulline. Those records document their own labels; they do not establish the ingredients of today’s Strawberry Watermelon Ice can or current store inventory.
The accompanying photograph shows STARBURST Cherry packaging from Nutrabolt’s September 2021 launch. It is a historical illustration, rather than a photograph of either Strawberry version or the current flavor reviewed above.
Compare convenience, ingredients and tolerance
A can provides a measured beverage without a shaker. For a powder comparison, check caffeine per intended serving, ingredient quantities actually disclosed and cost per serving. A tingling sensation or larger caffeine number does not prove better training results. NIH explains that studies of individual ingredients cannot establish the effects of every multi-ingredient combination.
Cellucor’s warnings limit this drink to adults and advise against use during pregnancy or nursing. Avoid combining it with a stimulant pre-workout, and account for other caffeine sources. FDA notes that caffeine sensitivity varies; sleep disruption, palpitations or anxiety are reasons to reconsider intake. Check the actual can before buying, especially when flavor, size or packaging differs.
Product pages and existing offers
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Sources and review notes
Reviewed October 12, 2026. Cellucor C4 Performance Energy. Strawberry Watermelon Ice manufacturer nutrition label. NSF 16 fl oz STARBURST Strawberry manufacturer label. NSF 12 fl oz STARBURST Strawberry manufacturer label. Nutrabolt September 28, 2021 STARBURST launch. FDA caffeine guidance. NIH exercise supplement evidence. This is editorial guidance based on identified labels and sources, not a report of personal product testing. Product versions and offers can change.
