Best Overall
Transparent Labs
BULK Pre-Workout
8.5Excellent
A fully transparent, Informed Choice-certified pre-workout with 8 g citrulline malate, 4 g beta-alanine and a moderate 200 mg of natural caffeine.
Informed Choice
5 videos$1.67/serving
C4 Original Pre-Workout
America's best-known budget pre-workout: 200 mg caffeine and great flavors, but beta-alanine, citrulline and creatine all sit below research doses.
6.8
Mixed
Nutrition Reviews score
Weighted across efficacy, quality, value, experience & transparency. See breakdown
- Form
- Powder
- Serving
- 1 scoop
- Servings
- 30
- Per serving
- $1.17
Sugar-free
Check price on AmazonBuy from the brand$34.99
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Last reviewed September 29, 2026 by the Nutrition Reviews Editorial Team · How we review
Our verdict
C4 Original is a sensible pick if you mainly want a caffeine boost in a flavor you will enjoy at roughly $1 a serving. Beyond the caffeine, its key ingredients are under-dosed or hidden in a proprietary blend, so it will not match fully dosed pre-workouts for pumps or endurance. Drug-tested athletes should choose the NSF-certified C4 Sport instead.
Best for
- Beginners wanting a moderate stimulant pre-workout
- Budget-conscious lifters
- People who value flavor variety
Skip it if
- Drug-tested athletes (not third-party certified)
- Anyone wanting clinically dosed pump ingredients
- Caffeine-sensitive people or late-evening trainers
How it scored
Our five-factor score out of 10. Factors are weighted by how much they matter to the outcome you’re paying for. Methodology
6.8
Mixedout of 10
- Efficacy30%6.0
Key ingredients at clinically studied doses, and how strong the evidence is.
- Quality & Purity25%7.0
Third-party testing and certifications, manufacturing standards, contaminant testing, recall history.
- Value20%7.4
Cost per effective serving compared with category peers.
- Experience15%8.0
Taste, mixability, texture and tolerability from aggregated buyer and creator feedback.
- Transparency10%5.5
Full label disclosure (no proprietary blends), available COAs, honest marketing.
Our review
C4 Original is Cellucor's flagship pre-workout and one of the most widely stocked in the US. The current "5th Gen" formula raises caffeine to 200 mg per scoop (the previous version had 150 mg) and pairs it with 2 g of CarnoSyn beta-alanine, a Velox citrulline-arginine blend, 1 g of creatine nitrate (NO3-T), 100 mg of PeptiPump lentil peptides and a small amount of huperzine A, plus vitamin B6, B12, folate and choline.
On the label, caffeine does most of the work. Beta-alanine at 2 g falls short of the 3.2–6.4 g per day used in most studies, and because it works by slowly raising muscle carnosine, it only matters with daily use. Citrulline and arginine share a 4.5 g proprietary blend with the beta-alanine and peptides, which leaves roughly 2.4 g for both combined — well short of the 6–8 g of citrulline typically studied for blood flow and training volume. The 1 g of creatine nitrate is far below the 3–5 g of creatine monohydrate that research supports, and PeptiPump and huperzine have limited human data.
That blend structure means individual citrulline and arginine amounts are not disclosed. C4 Original is also not third-party certified; within the C4 family it is the Sport line that carries NSF Certified for Sport.
Where C4 Original earns its popularity is price, flavor and availability. Buyers consistently praise the taste and easy mixing, and the moderate stimulant load suits beginners. Note that Amazon still lists the older 150 mg formula separately, so check the caffeine figure before you buy.
What’s inside
| Key ingredient | Per serving | Why it matters |
|---|---|---|
| Caffeine anhydrous A meaningful, well-studied dose and the ingredient responsible for most of the felt effect. | 200 mg | A meaningful, well-studied dose and the ingredient responsible for most of the felt effect. |
| CarnoSyn beta-alanine Below the 3.2–6.4 g/day used in most studies; benefits build with daily use and it causes harmless tingling. | 2 g | Below the 3.2–6.4 g/day used in most studies; benefits build with daily use and it causes harmless tingling. |
| Velox (L-citrulline + L-arginine) Inside a 4.5 g proprietary blend; roughly 2.4 g combined by subtraction, well under the 6–8 g of citrulline studied for pumps. | — | Inside a 4.5 g proprietary blend; roughly 2.4 g combined by subtraction, well under the 6–8 g of citrulline studied for pumps. |
| Creatine nitrate (NO3-T) Far below the 3–5 g/day creatine monohydrate dose with strong evidence; the nitrate form is less studied. | 1 g | Far below the 3–5 g/day creatine monohydrate dose with strong evidence; the nitrate form is less studied. |
| PeptiPump (bioactive lentil peptides) Proprietary ingredient with limited independent human research. | 100 mg | Proprietary ingredient with limited independent human research. |
| Huperzine A (Huperzia serrata extract, std. 1%) Undisclosed amount within a 205 mg energy and focus complex; evidence for training focus is thin. | — | Undisclosed amount within a 205 mg energy and focus complex; evidence for training focus is thin. |
Supplement Facts
Serving Size 1 Scoop
Servings Per Container 30
Amount Per Serving% Daily Value
Calories 10
Total Carbohydrate 1g
Total Sugars 0g
Includes 0g Added Sugars 0%
Vitamin B6 (as Pyridoxal 5-Phosphate) 3.4mg200%
Folate 100mcg25%
Vitamin B12 (as Methylcobalamin) 6mcg250%
Choline (as Choline Bitartrate) 225mg41%
Muscular Endurance & Performance Booster 4.5 g**
CarnoSyn® (Beta-Alanine) **
Velox® **
L-Citrulline **
L-Arginine **
PeptiPump® Bioactive Lentil peptides **
Creatine Nitrate (NO3-T®) 1 g**
Explosive Energy & Focus Complex 205 mg**
Caffeine Anhydrous **
Toothed Clubmoss (Huperzia serrata) (aerial parts) (std. for Huperzine A) **
* Percent Daily Values are based on a 2,000 calorie diet. † Daily Value not established.
Other ingredients: Citric Acid, Malic Acid, Silicon Dioxide, Natural & Artificial Flavors, Calcium Silicate, Sucralose, Acesulfame Potassium, FD&C Red #40
None declared on the retailer listing.
Flavors & variants
Icy Blue RazzWatermelonRainbow BlastHawaiian Punch Fruit Juicy RedJolly Rancher Green ApplePopsicle CherryPopsicle Grape
Testing & quality
C4 Sport, C4 Ripped Sport, C4 SuperSport and C4 Performance Energy drinks are listed as NSF Certified for Sport; C4 Original is not listed in the NSF database.
Goals it supports
Creator video reviews
Independent creators reviewing C4 Original Pre-Workout on TikTok and YouTube.
1 positive2 mixed1 critical
Pros & cons
What we like
- 200 mg caffeine per scoop is a meaningful, well-studied dose
- Zero sugar, and Cellucor says the core flavors use no artificial colors
- About $1.17 per serving at list price ($34.99 for 30), less with Cellucor's subscription discount
- Many flavors, including licensed Jolly Rancher, Popsicle and Hawaiian Punch versions
- Uses branded ingredients (CarnoSyn beta-alanine, Velox, NO3-T creatine nitrate)
Watch-outs
- Beta-alanine (2 g), citrulline + arginine (about 2.4 g combined) and creatine nitrate (1 g) are all below clinically studied doses
- 4.5 g proprietary blend hides the individual citrulline and arginine amounts
- C4 Original is not third-party certified (only the C4 Sport line is NSF Certified for Sport)
- Old 150 mg and new 200 mg formulas are sold side by side, which makes comparing listings confusing
Questions buyers ask
How much caffeine is in C4 Original?
The current formula has 200 mg per scoop, roughly two cups of coffee. The previous version, still sold under separate Amazon listings, had 150 mg. Check the tub or listing title, and count coffee, energy drinks and other supplements toward the roughly 400 mg per day the FDA cites as not generally linked to negative effects in healthy adults.
Why does C4 Original make my skin tingle?
The pins-and-needles feeling (paresthesia) comes from beta-alanine. It is harmless, usually fades within an hour and tends to lessen with regular use. The label itself notes some people may feel it. If it bothers you, start with half a scoop, which Cellucor also suggests for assessing tolerance.
Is C4 Original safe for drug-tested athletes?
C4 Original does not appear in the NSF Certified for Sport database. Cellucor's C4 Sport line does, so tested athletes should choose that version, or another product carrying NSF Certified for Sport or Informed Sport, and confirm the exact flavor on the certifier's website before competing.
Sources we checked (11)
- 1.cellucor.com/products/c4-original
- 2.cellucor.com/products/c4-original.json
- 3.cellucor.com/products/c4-original-old
- 4.gnc.com/pre-workout-supplements/cellucor-c4-original-pre-workout-v2.html
- 5.amazon.com/dp/B0CZ77N1NP
- 6.amazon.com/dp/B0F3RFQW1M
- 7.amazon.com/dp/B01N25BZXJ
- 8.nsfsport.com/certified-products/search-results.php?search=cellucor
- 9.brianyeungnd.com/2026/07/23/cellucor-c4-review/
- 10.feastgood.com/c4-original-pre-workout-review/
- 11.nutrabolt.com/about
Alternatives worth a look
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Fully dosed and naturally sweetened: 8 g citrulline malate, 3.6 g beta-alanine and a hefty 350 mg of caffeine balanced by 350 mg of L-theanine.
3rd-party testedcGMP
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8.2Good
A fully disclosed, clinically dosed pre-workout (300 mg caffeine, 6 g citrulline, 3.2 g beta-alanine) wrapped in GHOST's popular licensed candy flavors.
3 videos Shop$1.50/serving
8.1Good
An Informed Sport-certified, vegan pre-workout with 274 mg natural caffeine and 6.5 g citrulline, though its beta-alanine and creatine are under-dosed.
Informed Sport
2 videos$2.25/serving
Read the research
Guides 12 min read
How to Read a Supplement Facts Label Like an Expert
Serving sizes, %DV vs. upper limits, ingredient forms, proprietary blends and claims: a step-by-step method for reading any Supplement Facts panel with confidence.
Nutrition Reviews Editorial Team · Sep 28, 2026
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Pre-Workout Ingredients That Work (and the Ones That Don't)
Caffeine dosing by body weight, plus what research says about creatine, beta-alanine, citrulline, nitrates, tyrosine, proprietary blends and stimulant safety.
Nutrition Reviews Editorial Team · Sep 28, 2026
Safety 9 min read
Third-Party Testing Explained: NSF vs. Informed Sport vs. USP
What USP, NSF and Informed Sport seals actually test, how to verify a certification in two minutes, how to read a certificate of analysis, and where testing stops.
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