Cellucor C4 Original Pre-Workout Review

C4 Original Pre-Workout Powder from Cellucor is a pre-workout blend built to deliver sustained energy, endurance, and focus for hard training sessions. Each serving provides 200mg of caffeine and 2g of CarnoSyn Beta-Alanine, which the brand says supports muscular endurance. The brand states that the formula is designed for people who want to power through even the toughest sets. The product is presented as having been fueling athletes and fitness enthusiasts for over a decade. The listed key features include Hard Hitting Energy, with 200mg of caffeine for explosive energy in the gym. Muscular Endurance is supported by CarnoSyn Beta-Alanine for endurance during demanding workouts. AI-Powered Peptides refers to PeptiPump, which the page describes as an AI-powered designer peptide found exclusively in C4. Enhanced Focus comes from Huperzine combined with caffeine, which the brand says helps keep the user sharp from the first rep to the last. The page also lists Incredible Flavor, with a variety of flavors and zero sugar or artificial colors. The brand says C4 is backed by 20 years of sports nutrition expertise. The product is marketed to gym-goers and strength trainees, to people doing high-intensity workouts and cardio, and to athletes and fitness enthusiasts in general. The usage directions say to mix one scoop with 6 to 8 ounces of water and consume it 20 to 30 minutes before a workout. Beginners may start with half a scoop to assess their tolerance. The page warns that the product is intended only for healthy adults aged 18 or older. It should not be used by people who are pregnant or nursing, who take nitrates for chest pain, or who take PDE-5 inhibitors. Users are advised to consult a healthcare professional if they take meds, meds, meds, pseudoephedrine, or other medications, or if they have certain medical conditions. The product contains caffeine and should not be combined with other caffeine or stimulant sources. Users should stop use two weeks before surgery. The page also notes trademark and patent information for CarnoSyn, PeptiPump, NO3-T, and Velox. The statements have not been evaluated by the Food and Drug Administration, and the product is not intended to diagnose, treat, cure, or prevent any disease. The page displays a size of 30 servings and offers a subscription option.

Product Focus: Muscle and StrengthAlso covers:Brain
Tier ⓘ
Members see this product's tier and why. Tiers run from 1, the strongest evidence, to 5. How we grade →
Evidence ⓘ
How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
Biohacker Mentions
Cost per month
$35

Study, Trial or Testing Result Summary

MembersHuman studies

This product is graded on caffeine, the only ingredient on the label we have. The label lists 8.9 grams of caffeine per serving, which looks like a recording error, since the store listing gives 150 milligrams. …

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Review Totals and Summary

Members84 reviews
84 reviews · Cellucor website 74 · Walmart 10

Cellucor C4 Original Pre-Workout has about 74 ratings across various stores, with customer feedback presenting a picture. users appreciate its effectiveness, while a number express disappointment, particularly regarding recent changes to the product. **What it did for them** Customers who enjoy this pre-workout its ability to provide a , lasting energy and focus. …

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Biohacker Summary

MembersWhat our biohacker panel says

Caffeine is the main ingredient, and the panel is split between using it and about it. of the ten take it for focus, alertness, and fat burning around fasted exercise, and doses mentioned run from 100 to 150 milligrams up to 100 to 400 milligrams, with 150 to 200 milligrams before a short nap and 300 milligrams slow release in the morning for jet lag. …

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RAL Summary

MembersThe tier and why

trials show added muscle growth, so the study support is only partial. …

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More Details

MembersBody systems · Combine with · Possible side effects

Body systems: Muscular system, Nervous system. Combine with and possible side are for members.

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Supplement Facts

Includes 0g Added Sugars 0 g · Vitamin B6 3.4 mg · Folate 100 mcg DFE
Supplement Facts
Serving Size 8.9g (Approx. 1 level scoop)
Servings Per Container 30
Amount Per Serving% Daily Value
Calories10
Total Carbohydrate1 g<1%
Total Sugars0 g
Includes 0g Added Sugars0 g0%
Vitamin B6 (as Pyridoxal-5-Phosphate)3.4 mg200%
Folate (as 6S-5-Methyltetrahydrofolate calcium salt)100 mcg DFE25%
Vitamin B12 (as Methylcobalamin)6 mcg250%
Choline (as Choline Bitartrate)225 mg41%
Muscular Endurance & Performance Booster4.5 g†
CarnoSyn® Beta-Alanine2 g†
Velox® Patented Performance Blend1.2 g†
L-Citrulline1.2 g†
L-Arginine1.2 g†
PeptiPump® Bioactive Lentil peptides100 mg†
Creatine Nitrate (as NO3-T®)1 g†
Explosive Energy & Focus Complex205 mg†
Caffeine Anhydrous200 mg†
Toothed Clubmoss (Huperzia serrata) aerial parts extract (std. 1% Huperzine A)5 mg†
* Percent Daily Values are based on a 2,000 calorie diet.
† Daily Value not established.

Other ingredients: Other Ingredients: Citric Acid, Malic Acid, Silicon Dioxide, Natural & Artificial Flavors, Calcium Silicate, Sucralose, Acesulfame Potassium, Spirulina Extract (color).

Label source: Cellucor · Report a label change

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Graded October 26, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.