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· UNLEASH YOUR ULTIMATE WORKOUT - C4 Ultimate Shred is designed to give you the ultimate energy to power through your workout with 300 mg of caffeine. · ULTIMATE METABOLISM BOOST - Experience the ultimate pre-workout with Capsimax Cayenne, a powerful thermogenic ingredient that boosts metabolism. · MAXIMIZE ENDURANCE AND PERFORMANCE - C4 Ultimate Shred helps you power through even the toughest workouts with three forms of Citrulline and CarnoSyn Beta-Alanine, which fights muscular fatigue. · INCREDIBLE FLAVORS - With billions of servings of C4 branded products sold worldwide, the C4 brand sets the standard for great flavors in pre-workout supplements. · ACHIEVE EXTREME DEFINITION - C4 Ultimate Shred's cutting-edge blend of premium ingredients, including 6g of Citrulline Pump Matrix, 3.2g of CarnoSyn Beta-Alanine, and Capsimax Cayenne Extract, helps you chisel your physique and achieve extreme definition.
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Maile ClancyReviewed in the United States on April 25, 2025
This is my favorite pre-workout drink.
Ashley PerkinsReviewed in the United States on March 19, 2025
Great pre workout! Very yummy and mixes well!
mr newyorkReviewed in the United States on July 30, 2024
This has become a key part of my workout routine. The lemon Italian ice flavor is refreshing and easy to drink, making it a pleasant way to start my workouts. The energy boost is almost immediate and sustains me throughout my sessions, helping me push through tough exercises with increased focus and endurance. A couple of things to note: the powder can sometimes be a bit clumpy, so shaking it well is essential. Also, it’s quite potent, so starting with a smaller serving is a good idea if you’re sensitive to stimulants.
Michael B.Reviewed in the United States on April 30, 2025
The taste is not as bad as others make it out to be, but it's not exactly good either. I just chock it down and hope I see some results.
Jordan CastilloReviewed in the United States on April 10, 2024
I’ve been using C4 pre-workout drink for a while now, and I couldn’t be happier with the results. First and foremost, the taste is incredible – it’s like a treat before hitting the gym! But what really impresses me is the sustained energy boost it provides without any jitters or trouble sleeping at night. Whether I’m gearing up for an intense workout session or powering through a busy day, C4 keeps me alert and focused without any unpleasant side effects like palpitations. It’s become an essential part of my routine, and I highly recommend it to anyone looking for a reliable pre-workout supplement that delivers both in taste and performance.
Robert KelleyReviewed in the United States on June 8, 2023
C4 in my opinion makes the best product. Not only does it give you plenty of nice clean energy and not that skin crawling overly hyped up feeling. And the energy lasts a good amount of time to help give you extra kick in the rear to get to the gym or whatever your workout may be and put in that work. And best of all this part is huge for me you don't get that nasty almost depressing feeling from the caffeine crash. It's a nice clean e.ergy that is the best word i can think of to explain it. Clean energy. I have been using C4 for years now and I won't use anything else pre workout or energy drink.
Trevor SmithReviewed in the United States on July 16, 2024
Edit: I’m coming back and editing my review and dropping a Star. I subscribed and “saved” to get a new container and every month the price has gone up. For me, the price says $52-54 for a 30 serving container before taxes. The basic C4 is like $20 something. I find this odd. Curious if everyone else has a similar price of the $52-54 and noticed the monthly price increases for seemingly no reason. I’ve bought the OG C4 years ago and it didn’t do anything for me. I bought this one a few months ago since my usual pre was out of stock. The taste is awful, to be fair, most pre tastes bad to me. But this one burns when you drink it so I take 1 star off. That being said, the effects from it are great. I LOVE a pre that makes me jittery and itchy and this delivers. I saw someone else say they felt bloated and I think I’ve experienced that as well. I did abs first when I got to the gym once and nearly had to vomit for some reason but other than that good experience and I’m buying my second container. I prefer pump igniter black, but they’ve been out of stock on Amazon for months now unfortunately.
Chinos BreadReviewed in the United States on August 9, 2024
I bought this for work cause I heard it had a lot of energy and this thing had me geeked at work, felt like I was on crack at the office. 10/10 would recommend.